{'fraction_non_alphanumeric': 0.02697590772379151, 'fraction_numerical': 0.014666211900406189, 'mean_word_length': 5.176177709689774, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Producer Services, Manufacturing Linkages, and Trade

Working with a mix of panel data on goods and services trade for the OECD for 1994-2004, combined with social accounts data (i.e. data on intermediate linkages) for 78 countries benchmarked to the panel midpoint, we examine the role of services as inputs in manufacturing, with a particular focus on indirect exports of services through merchandise exports, and also on the related interaction between service sector openness and the overall pattern of manufacturing exports. From the cross-section, we also develop a set of stylized facts linking services to level of development and the density of intermediate linkages. We find significant and strong positive effects from increased business service openness (i.e. greater levels of imports) on industries like machinery, motor vehicles, chemicals and electric equipment, supporting the notion that off-shoring of business services may promote the competitiveness of the most skill and technology intensive industries in the OECD. Conversely, we find evidence of negative general equilibrium effects for sectors that are less service intensive.

Merchandise trade dominates international trade, with about 70-80% of all crossborder transactions involving goods trade. Yet services dominate the domestic economic landscape in most middle-and high-income economies. At the same time, there is a growing realization that official trade data may actually underplay the role of services in trade, as they reflect neither the use of services as inputs for manufactured goods destined for export markets, nor the importance of services sold through local affiliates of multinationals. (See Hoekman, 2006;Hoekman and Prima Braga, 1997.) In this paper we examine the role of services as inputs in manufactured exports, with a particular focus on indirect exports of services, and also on the related interaction between service sector openness and the relative performance of different sectors in the overall pattern of manufacturing performance. 1 We provide crosscountry and panel-based evidence to complement the case-study approach of the recent literature, while working with data that reflects the sweep of the information technology revolution across the service industries in the 1990s. Our data include a mix of panel data on goods and services trade for the 30 OECD Members for 1994-2004, combined with social accounts data (i.e. data on intermediate linkages) for 78 countries inclusive of our OECD sample and benchmarked to the year 2001.
With increasing per capita income, we find an increasing demand for producer services as inputs in manufacturing production, especially so for the narrowly defined category of business services. We also find strong direct and indirect multiplier effects for producer services, again positively related to income levels. Having 1 A related strand of the literature focuses not so much on production patterns linked to intermediate services trade and FDI, but on the corresponding shift in employment patterns and productivity that follows from trends in FDI and offshoring. (Feenstra andHanson 1999, 2003;Bloningen 2005.) quantified the importance of services as upstream inputs in manufacturing production, we next turn to the interaction of trade in both goods and services on the economy. On the one hand we observe strong indirect exports of producer services embodied as inputs in manufacturing. This is true across our sample of 78 low-, middle-and highincome countries. The relative importance of services in the total activity content of exports is also significantly correlated with income levels. With increasing per capita income the service intensity of exports increases -especially so for business services.
On the other hand, from panel regressions, we also find significant and strong positive effects from increased business service openness (implying greater trade and FDI flows) on industries like machinery, motor vehicles, chemicals and electric equipment. Conversely, we find evidence of negative general equilibrium effects for sectors that are less service intensive. This set of results on services and goods trade linkages supports the notion that off-shoring of business services does actually promote the competitiveness of the most skill and technology intensive industries in the OECD countries, with an impact similar to that of biased technical change.
Finally, we find evidence that the importance of services as inputs in the postindustrial (high income OECD) economies has increased substantially, with the depth of intermediate linkages in modern service-based economies being greater than at the start of the 1990s.
We proceed as follows. In Section 1 we provide a short overview of the current literature, placing the present exercise in context. In Section 2 we then provide an overview of production and trade patterns, including the development of stylized facts. In Section 3 we then turn to panel regressions to examine trade-based linkages.
We offer a brief summary and concluding remarks in Section 4.

Background
Explanations for the now dominant role of services in modern economies, relative both to low-income countries and to historic patterns within OECD countries themselves, have generally emphasized demand-side factors. Clark (1940) was the first to note a rising share of services associated with economic growth and attributed this to demand side factors, while later Baumol et al. (1985) related the pattern of rising final or consumer service prices to relative productivity differentials and to a predicted stagnation of overall productivity growth. In general, this literature stressed final demand services and non-homothetic demand as the driving force in service sector growth. The message of Baumol, in particular, was that services would grow to be an ever-increasing drag on productivity growth in the OECD. Yet there have also been important post-War changes linked to intermediate or producer services.
Working with national accounts data that largely pre-date the information technology revolution of the 1990s, Park (1989), Park and Chan (1989), and Uno (1989) have all confirmed the post-War rise in the importance of producer service inputs into manufacturing along the lines stressed by Katouzian (1970) and Francois (1990a). In contrast to the Baumol disease characterized by productivity slow-down, producerservice centered research points instead to service sector expansion linked to overall productivity growth rather than stagnation. (See Francois 1990a;Hoekman 2006.) Well before the full impact of the information technology revolution was felt, Bhagwati (1984) pointed out that the disintegration of production (a process he called "splintering") combined with increased trade in services was likely to lead in the future to what the recent empirical literature now calls offshoring. This has been confirmed by subsequent experience and the findings of the services offshoring literature. Recent literature along these lines includes Amiti and Wei (2005), Feenstra and Hanson (1996, 1999, Francois, Grier, and Nelson (2004), Javorcik (2004), Markusen (2005), Markusen and Venables (1997), and Yeaple (2006).

Data
We work here with data covering trade in goods and services, and also data on intermediate linkages between goods sectors and services sectors from national accounts data for 78 countries. This requires combining data from a number of different sources. Our sectoring scheme is ultimately a compromise, limited by the structure of our national accounts data, and also by the constraints imposed by the breakdown of available service trade data. We employ a concordance so that services and goods trade data are defined at the same level of aggregation for which we also have corresponding data on intermediate use by manufacturing and service industries (upstream and downstream linkages). We define our basic data sources here, as well as some indexes derived from these data that are used in the sections that follow. 2 We have a panel of trade data spanning from 1994-2004 for the 30 OECD Members, and a broader cross-section of social accounting data for 78 countries for the mid-point of the panel, year 2001. Data on services trade come from the OECD supplemented with published IMF balance of payments statistics. These data are based on balance of payment statistics and correspond mainly to what is known as GATS mode 1 -cross border trade -and mode 2 -movement of consumers. Data are usually reported for total services trade flows on a bilateral basis or for trade flows to the world broken down by sectors. EUROSTAT provides data on services trade flows on a dual breakdown, by partners and sectors at the same time for a limited number of countries. 3 For our purposes, the sector breakdown is sufficient. In these data, information on detailed services trade by sector is limited to OECD Members. This gives us a range of national per-capita incomes spanning from Mexico to Switzerland, but leaves out the lower income countries. As such, while we will be working with national accounts data for countries covering the full range of low-, middle-, and high-income countries (basically from Malawi to Switzerland) in discussion of the 2001 cross-section, our panel analysis of trade data will by necessity be limited to the Mexico-to-Switzerland sub-sample of countries. Goods trade comes from the United Nations' COMTRADE database on commodity trade, aggregated to the sectors in our national accounts data (see below). Data on the national structure of production come from a set of input-output tables, organized in the form of social accounting matrices, for 78 countries for the year 2001. Of the 29 sectors, 15 are manufacturing sectors and 10 are service sectors (see Table A1 in the appendix). We focus in particular on producer services, which are defined as the following: communication services, financial services, insurance services, business services and transportation services. 4 We have organized our data as social accounting matrices (SAMs), meaning that we have a single entry bookkeeping representation of national income and receipts by sector and final consumers. Indexing the column by i and the row by j, element S ij represents the expenditures from sector j on inputs from sector i (in the case of intermediate demand), or else it represents final consumption or external trade (imports and exports). (Reinert and Roland-Holst 1997;Bloningen et al 1997). We also make use of a number of indexes derived from our SAMs. To examine 3 Eurostat covers 31 reporting countries -the EU25 plus Bulgaria, Japan, Norway, Romania, Turkey and the USA -and 64 partner countries over a total period of 10 to at most 20 years (1985)(1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004). Bilateral services trade flows are classified into 11 economic activities according to the BOP Manual 5 classification. 4 For a discussion of source data see Dimaranan (forthcoming). production linkages, we begin by denoting a country's n x n social accounting matrix by S and a column unit n-vector by e (where n is the number of elements in the column and row indexes.). Then c = ′ e S is the column-sum vectors of S. If a ^ over a vector is used to denote the corresponding n-dimensional diagonal matrix, then Where A represents the column-sum normalized SAM. Hence, while S ij is the actual expenditure received by sector i from sector j, an element A ij is the proportion of sector j's expenditure received by sector i. Working with the column-normalized A matrix, we examine correlations between cross-country per capita income levels and the basic density of the intermediate use matrix. Formally, we define the linkage index D as: where λ is the set of industry accounts and ω is the set of industry plus value-added accounts. The index D measures the relative density of the column-normalized intermediate use matrix. It reflects the importance of backward linkages between sectors, relative to the total level of production activity in the economy.
While the elements of the A matrix can be interpreted as direct input coefficients, we will also be interested in the complete set of linkages, involving both direct input demand (like services bought by the transport equipment sector), and also indirect linkages (such as the services bought by the steel sector which then is sold downstream to the transport equipment sector). (See Reinert and Roland-Holst 1994.) To do this, we divide the n accounts of a country's SAM into two groups: m endogenous accounts and k exogenous accounts. Following convention, we define the k exogenous accounts as the government, capital, and rest-of-world accounts (see Robinson, 1989 gives the share of commodity i in total export demand, and the column vector Φ contains the full set of these coefficients. This vector represents direct export shares.
To account for intermediate linkages, we also define the column vector Elements ω i of Ω give the weighted average direct and indirect effect on the value of activity in sector i that follow from increasing export demand by one dollar, holding the sector composition of total exports constant.

Services in Production
We start here with a focus on linkages between services and manufacturing. We make the following observations, based on patterns in the data as discussed in this section.
Observation 1: The importance of services in production rises in the cross-section with the level of development.
Observation 2: The density of intermediate linkages (defined below) exhibits an inverted U-pattern in the cross-section.
Observation 3: Service linkages to manufacturing have become increasingly important in the 1990s.
Observation 4: The rising importance of service linkages to manufacturing in the 1990s has shifted the turning point in the overall U-pattern in the density of intermediate linkages to a higher income level over the 1990s.
Building on patterns summarized in Observations 1 to 4 and explored econometrically in this section, in the next section we will then turn our attention to the implications of these basic patterns for the interaction between trade in goods and trade in services.
From the earlier literature on the structure of production and demand across countries (Park 1989, Francois andReinert 1996), we expect to see a rising demand for producer services for countries at higher levels of economic development. At the same time, from the corresponding literature on final demand (Hunter and Markusen 1988, Bhagwati 1984, Panagariya 1988) we also expect a shift toward final service production driven by final demand factors. In employment and output terms, what results is a U-pattern, where the service sector in general shows an initial decline when a country shifts toward a more industrialized structure of production, and then starts to increase its share in the economy again as the country moves further towards a more modern, service-based economy. This overall pattern is driven by the appears that the complexity of intermediate linkages (the overall "roundaboutness of production") has grown deeper over the 1990s for the higher-income service-based economies, a pattern consistent with a generally rising importance for services as inputs. In the figure we show the share of services used in individual manufacturing sectors (from our use coefficients A ij ). While no significant relationship (positive nor negative) between per-capita income and the demand for total services can be identified, we do find a positive relationship for most industries when looking at producer services only. However, the patterns point toward significant differences across individual manufacturing industries. When restricting our attention to business services only (these are activities such as accounting, book-keeping, management consultancy services, operational leasing, legal services, advertising, etc.) as in Figure 1 we find a strong positive correlation for all manufacturing sectors. We test for the strength of this correlation for different service categories with the simple cross-section OLS model, given in equation 6: In equation (6) results separately for each manufacturing industry using producer services as the dependent variable. What we identify is a significant correlation between income levels and service intensity -U-shaped and statistically significant at the 1%confidence level -for the following industries: food, textiles, clothing, leather, paper, coke, chemicals, and metals. These industries are mostly labor and resource intensive.
With increasing per capita income, the use of services as inputs in industrial production of such more labor intensive industries first declines and at a more developed stage rises again. Thus, a significant relationship between rising per-capita income and the use of services in manufacturing production emerges clearly at the industrial sector level.
[ Figure 1 here] Whether these are sourced locally or imported from abroad cannot be assessed from this data, though Francois (1990) and Francois and Reinert (1996) offer evidence that this involves both off-shoring and a real qualitative shift toward greater service intensity in the manufacturing sector.
Tables 1.3 -1.6 give comparable results for other producer services, such as communication services, financial services, insurance services and transportation services. The latter activity is usually not counted as a producer service. However, the increasing fragmentation of production also brings about a delocalization of production units. As a consequence, transportation services should also play an increasing role in modern service based economies. We find a U-shaped relationship between the use of services in production and stage of development in several of the sectors, especially so for financial and insurance services in the more labor and resource intensive industries.
[ Table 1 here] We turn next to the overall density of the intermediate use matrix, or what is also known as the increasing roundaboutness of production. Services play an important role here (Francois 1990, Javorcik, Arnold andMattoo 2006), while from earlier cross-country comparisons of input-output structures (Park andChan 1989, Francois andReinert 1996) we know that services exhibit fewer inter-industry linkages overall than manufacturing. What this implies is an overall shift in the density of the intermediate use matrix, with an initial rise from low to middle income economies (or from primary to manufacturing) and a subsequent drop with the move to higher income economies (or from manufacturing to service based). [ Figure 2 here] We next look at the combination of direct and indirect effects for services generated by additional output demand in manufacturing sectors. In a first step, we simply group the multipliers ω from equation (5) by three types of manufacturing sectors, as shown in Figure 3, and report them for five income groups (see Table A1 in the appendix for the grouping of industries and countries). There are apparent differences between the effects generated by more skill and technology intensive industries as opposed to more labor and resource intensive industries. The labor intensive industries (food, textiles, clothing, leather and other transport equipment) involve lower multiplier effects in higher income countries. Further, multiplier effects are decreasing with rising per-capita income in most service categories apart from business services, housing and recreational services in these industries (lower panel of Figure 3). In contrast, multiplier effects within service sectors grow stronger with increasing activity in technology intensive industries in more advanced countries (upper panel of Figure 3). This rise is especially pronounced for business services. This again underlines the increasing importance of intermediate linkages through a higher degree of outsourcing of business service inputs and more use of overall service inputs in the high-income countries.
The ranking of service activities with the greatest total linkage multipliers ω from manufacturing demand differ between resource intensive, labor-intensive and technology intensive industries. While trade and repair is the sector receiving the strongest effects from increased production in all industries, the magnitude of the multiplier effect is highest in labor intensive industries. The multiplier coefficient for this service activity declines in the skill and technology intensity of the manufacturing sector, leading to the consequent output effects. We further observe a decline in multiplier coefficients for transportation services with increasing skill and technology intensity in manufacturing. On the other hand, business services coefficients are stronger the more sophisticated the manufacturing industry. All this suggests an increasing importance of business service activities along with economic development and the according structural shift towards more skill and technology intensive production.
[ Figure 3 here] As a next step we report OLS estimates for the stylized facts highlighted in Figure 3.
The regression equation is defined by equation (7): Where M ijk are the direct and indirect effects -as defined in equation (3) Table 2.2 for leather and clothing reveals that these two industries account for lower indirect and direct output effects in communication services in more advanced countries. On the other hand, the production of machinery, electrical equipment and motor vehicles generates increasingly strong multiplier effects in communication services in higher income countries. A similar finding arises for financial services, while here we often find a Ushaped relationship in less technology intensive industries (Table 2.3). In insurance services, again the same industries account for higher multipliers in the higher income economies (Table 2.4). We also have a negative income correlation for multipliers in transportation (Table 2.5). Almost all manufacturing industries generate lower multipliers for transport services in the higher income economies. Only in the production of electrical equipment and motor vehicles and in the petroleum industry do we see first an increasing demand for transportation services in value terms, which declines again at high stages of development. In our view this is likely to reflect greater overall efficiency in the transport systems of high income countries, rather than a structural shift in input demand.

Services and Trade
From our discussion of intermediate linkages between services and manufacturing industries, we should expect trade in services, and the general openness of the producer service sectors, to play a role in the relative efficiency of manufacturing industries. Indeed, this is a basic point to be taken from the theoretical literature on trade in services. (Markusen 1989;Francois 1990b;van Marrewijk et al 1997;Markusen Rutherford and Tarr 2005). In this section, we examine the interaction between the evolution of producer service imports, on the one hand, and the relative success of various industries in overall manufacturing exports on the other. Because our panel data on services trade by sector are limited to the OECD, we work with our panel dataset of OECD exports, combined with the indirect service intensity coefficients M derived from our broader sample of social accounting data. We make the following observations based on our data: Observation 5: In the cross-section, exports become increasingly producer (business) service intensive (in terms of combined direct and indirect linkages) with a rising level of development.
Observation 6: In the panel, inward FDI and trade openness in the service sector benefits the export competitiveness of manufacturing sectors with stronger service linkages, and hurts those with weaker upstream linkages to services.
Observation 7: In the panel, increased service sector openness (trade and FDI) yields a general equilibrium shift in value added and employment to service-input intensive manufacturing sectors.
Observation 8: From the panel, the combination of trade, output, and employment effects means that service sector openness has boosted the competitiveness of more technology and skill intensive industry in the OECD, at the expense of sectors like textiles and clothing.

Direct and Indirect Exports
From our development above of stylized facts linked to production, we expect greater service intensity to be linked to level of development. At the same time, from basic trade theory (Feenstra andHanson 1996, 1999) we can also structure our expectations about how openness to intermediate services trade will impact on manufacturing.
Indeed this is the guiding paradigm in the empirical off-shoring literature. We should expect those manufacturing sectors that are more producer service intensive (i.e. the higher technology sectors) to systematically benefit from increased openness, not only directly, but also indirectly in the competition with other sectors in the economy for resources. Indeed, in general equilibrium, we can expect more service intensive sectors to expand, and less service intensive sectors to contract.
We start here with the service intensity of total exports as measured by the direct and indirect effects generated by an additional dollar of exports in various other sectors of the economy. This involves the terms Φ and Ω as defined in equations (4) and (5). Figure 4 plots the combined direct and indirect multipliers ω for export effects for all sectors of the economy (except personal, cultural and recreational services, public services and housing, in which we are not interested here). In effect, this gives a fuller picture of the activity content of exports than simple export composition. Especially for the lowest income group, the most important contributor to exports is the agricultural sector. With rising per-capita income, the sector focus of exports is oriented increasingly toward industries such as chemicals, electrical equipment, machinery and especially business services. Within the services sector, again the relative importance of activities like trade and repair and transportation services declines with a rising income level.
[ Figure 4 here] Estimated OLS coefficients based on the data in Figure 4 are reported in Table 3, based on equation (8). (8) where ω ij is the additional activity (direct and indirect) in service sector i in country k as a result of one unit of additional merchandise exports of the economy. Here we run a regression for each service activity over all 78 countries in the sample. If we relate the indirect and direct activity composition of exports to per-capita income for our selected producer related service categories, we find again the strongest positive relationship in business services and further a weak (but not statistically significant) relationship in finance and insurance. Communication services show a weakly negative relationship and transportation services are characterized by less economic activity generated through additional exports in higher income countries. Thus again, it is the business services in which economic activity is rising significantly as a result of increased openness of the economy -proxied through exports. However, at very high levels of development, this trend is reversed and additional goods exports do not generate more activity in business services.

Services Imports and Goods Export Composition
Finally, we are interested in the impact of service sector imports on manufacturing performance. From Arnold, Javorcik, and Mattoo (2006)  Tables 4-6 offer an assessment of linkage-driven effects, based on panel regression of OECD export data at the sector level for the industries defined in Appendix Table A1 for the time period 1994-2004. In evaluating the role played by service imports (i.e. off-shoring of services) we distinguish between different types of services, core business services, communication, financial and insurance services.
Data for economy-wide service imports in each category (taken from the IMF) is interacted with the share of the respective service category used in each manufacturing industry. The latter is obtained from the SAMS (i.e. the M ij coefficient from Section 2). In this way we proxy for the total role of business service imports in the cost structure of various manufacturing industries. 5 We further include total FDI inflows into the service sector as an alternative route for service inputs from abroad.
All these variables are in logs. In addition, we control for implicit trade barriers as  In addition, there may also be a serious problem of endogeneity, especially between openness on the export side of the manufacturing sectors and their openness to service imports. Therefore we employ a 2SLS estimator. Because we work with share data, our dependent variable is put through a logistic transformation. (10) where X ikt is one of the following: exports, value added or employment of industry i in country k in year t.
We cluster our 15 industries into the three groups of technology intensive, labor intensive and resource intensive. Regressions are run separately for the average over each group of industries and the results are reported in Tables 4-6. Tables A2-A4 in the appendix contain further regression results for individual industries.
What emerges from the regressions is that imports of business services are an important determinant of the pattern of manufacturing exports in the most advanced industries. While no significant effects from service imports on total manufacturing exports on average can be detected, there are clear positive effects in the most technology intensive industries (here defined as chemicals, electric equipment, machinery and motor vehicles). Again, as was to be expected, it is the imports of core business services that play a role here, while the coefficients on communication, insurance and financial services do not turn out to be significant for the group as such.
The results differ somewhat for each individual industry (see Appendix Table 2.1).
On the other hand, a negative effect from increased business service imports emerges when we are restricting our attention to labor intensive industries only. This holds true in particular for the textiles, clothing and leather industries. Finally, no effects are found for resource intensive industries. This points to the more advanced industries being vertically integrated, not only nationally but also internationally through the off-shoring of business services. Indeed, the results in Table 4 support the notion that off-shoring of business services does actually promote the competitiveness of the most skill and technology intensive industries.
We find similar effects for domestic value added and employment in manufacturing. We report these results in Tables 5 and 6 [Tables 4 -6 here]

Summary
A marked aspect of the globalization process has been increased international integration not only of goods sectors, but also of service sectors. This is reflected not only in trade agreements and negotiations, but also in trade flows and FDI. Yet,               Note: 2SLS regression results, instruments used: initial values, country dummies, value added of resp. industry group; ** (*) indicates significance at 1% (5%) level.       Note: 2SLS regression results, instruments used: initial values, country dummies, value added of resp. industry group; ** (*) indicates significance at 1% (5%) level. Note: 2SLS regression results, instruments used: initial values, country dummies, value added of resp. industry group; ** (*) indicates significance at 1% (5%) level. Note: 2SLS regression results, instruments used: initial values, country dummies, value added of resp. industry group; ** (*) indicates significance at 1% (5%) level. Note: 2SLS regression results, instruments used: initial values, country dummies, value added of resp. industry group; ** (*) indicates significance at 1% (5%) level.