Specifically, we examine 107 manufacturing industries at the three-digit SIC code for the period 1989 - 2002. In view of the joint determination of research and pollution outcomes, we estimate a system of simultaneous equations, using appropriate instruments to identify each endogenous variable. Our...
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harmonized system codes and SIC/NAICS product classes and industries. Journal of Economic and Social Measurement 37, no. 1-2: 61-96.Justin R. Pierce and Peter K. Schott, 2009. "A Concordance Between Ten-Digit U.S. Har- monized System Codes and SIC/NAICS Product Classes and Industrie...
If the State Code is not abbreviated, see state abbreviations inIRM3.24.38.3.4.14.11, BMF General Instructions. (3) Province Codes Enter the two-alpha characters. If the Province code is more than two characters, enter the first character followed by a pound sign (#). ...
Now i have to generate this variable : The mean of the standard deviations of the cash flow ratio over 3 years for firms in the same two-digit SIC-code industry. Since SIC is a 4 digit number, same 2 digit industry means it has the same first 2 numbers. I've tried a lot of ...
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