Broadcast Expenses  The following table presents our significant operating expense categories for the years ended December 31, 2010, 2009 and  2008 (in millions):  Station production expenses. Station production expenses for 2010 increased compared to 2009. This increase was primarily due to  an increase in fees pursuant to network affiliation agreements, increased promotional advertising expenses, increased  compensation expense and increased maintenance costs to remove analog equipment. Additionally, news profit share expenses  increased due to increased news performance which resulted in higher payments to our news share partner pursuant to news  share arrangements with another broadcaster. These increases were partially offset by a decrease in electric expense due to the  digital signal conversion in June 2009 and cessation of analog transmission.  Station production expenses for 2009 decreased compared to 2008. This decrease was primarily due to lower compensation  expense and electric expenses due to the digital signal conversion in June 2009 and cessation of analog transmission. Additionally,  promotional advertising decreased due to our revised media-spending plan. Station selling, general and administrative expenses. Station selling, general and administrative expenses increased for 2010 compared  to 2009. This increase was primarily due to higher national sales representative and local commissions costs due to an increase in  sales and increased non-income based tax expenses. These increases were partially offset by decreased trade transaction expense  and bad debt expense. Station selling, general and administrative expenses decreased for 2009 compared to 2008. This decrease was primarily due to  lower compensation expense and local commissions and national rep commissions savings due to lower revenues in 2009  compared to 2008. We expect 2011 station production and station selling, general and administrative expenses, excluding barter, to trend higher  than our 2010 results.  Amortization of program contract costs and net realizable value adjustments. The amortization of program contract costs decreased  during 2010 compared to 2009 and 2009 compared to 2008. Over the past few years, we have entered into barter arrangements  for short-term program contracts which are less expensive and result in lower contract cost amortization. We expect program  contract amortization to trend lower in 2011 compared to 2010.  Gain on asset exchange. During 2009 and 2008, we recognized a non-cash gain of $4.9 million and $3.2 million, respectively, from  the exchange of equipment under agreements with Sprint Nextel Corporation and in association with the FCC’s decision to allow  Sprint Nextel Corporation to utilize our vacated analog spectrum in exchange for the new digital equipment. We received all  applicable equipment pursuant to the agreement in 2009.  Corporate general and administrative expenses. See explanation under  Corporate and Unallocated Expenses Impairment of goodwill, intangible and other assets . We completed our annual test of goodwill and broadcast licenses for impairment  in fourth quarter 2010, 2009 and 2008. Due to the severity of the economic downturn and the decrease of our market  capitalization, we also tested our goodwill and broadcast licenses for impairment during the first quarter 2009. See  Note 4.  Goodwill, Broadcast Licenses and Other Intangible Assets , in the Notes to our Consolidated Financial Statements. During 2010, we  recorded impairments of $4.8 million related to our broadcast licenses and other assets. During 2009, we recorded impairments  2010 Annual Report    15  Percent Change (Increase/(Decrease))  2010  2009  2008  ’10 vs. ‘09  ’09 vs. ‘08  Station production expenses   $ 154.1   $ 142.4   $ 159.0  8.2%  (10.4%)  Station selling, general and  administrative expenses   $ 127.1   $ 122.8   $ 136.1  3.5%  (9.8%)  Amortization of program  contract costs and net  realizable value adjustments   $ 60.9   $  73.1   $  84.4  (16.7%)  (13.4%)  Corporate general and  administrative expenses   $ 23.7   $  8.6   $  7.3  175.6%  17.8%  Gain on asset exchange   $  —  4.9  3.2  (100.0%)  53.1%  Impairment of goodwill,  intangible and other assets   $  4.8   $ 249.6   $ 462.3  (98.1%)  (46.0%) 