Facebook did accept investments from companies, and these investments suggested fluctuating valuations for the firm. Posner's investments were typically motivated by attractive valuations, balance sheets and cash flow characteristics. Property classes, tax rates, assessment rules and valuations vary by jurisdiction. Purchasing decisions are generally a function of loss valuations expressed in currency per kilowatt. Existing authorizations and valuations vary considerably worldwide. The difference between the two valuations is the "value of flexibility" inherent in the project. In 2001 Kopin joined a broad decline in high-tech stock valuations. They are assigned meaning and truth-values by mappings called interpretations and valuations, respectively. In these circumstances, utilities argue in favor of reproduction cost valuations. The situation is simpler when the valuations of the bidders are i.i.d. The new valuations took effect for the 2007 tax year. The accuracy of Zoopla's computed valuations is disputed. There are formula 2 agents which have different valuations for each outcome. It also used regular valuations to balance competing interests. Chakravartty argued that these semirealist valuations legitimize scientific theorizing about pragmatic kinds.