Aiigrei^ali' Analysis of Research and Productivity in Afiriculture 81 



Before turning to the research coefficients and their implica- 

 tions for productivity, let us present a discussion of the labor 

 coefficient. 



A Digression on Labor and Land Productivity 



The inclusion of the country-specific (level) dummy variables 

 clearly affects the labor and land coefficients. The labor coefficient 



Table 5.1: The Production Function 



Notes: 



No. of observations: 144, For definitions of variables 1-6, see notes to appendix 

 table 6.B. 



2: sum of coefficients of variables 1-5. 



In parentheses: t values. 



The following countries had common intercepts: (1) Austria, UAR; (2) US, 

 Sweden; (3) Finland, Greece; (4) Italy, UK; (5) Brazil, Colombia; (6) Mexico, Peru, 

 Venezuela; (7) Turkey, South Africa. Grouping was according to the closeness of 

 individual coefficients in previous runs. 



