Invesimeni in Agricultural Research ami Extension: A Survey 33 



course these socioeconomic variables may in turn be important 

 determinants of plant physiology research. It does appear, 



Table 2.8: Investment Demand Function (Equation 2) 



(O (2) (3) 



Plant physiology (p^^ 



Dummies f|3j _ yes yes 



Notes: 

 No. of observations: 435 



Dependent variable: publications in country by crop 

 In parenthesis: / values 

 Data are averages for 1962-68 



however, that investment decision makers recognize the comple- 

 mentarity between the two types of research. On balance these 

 results provide support for the induced institutional response hy- 

 pothesis of Hayami and Ruttan (1972). 



The inclusion of the dummies, the jS/s, in the regressions did 

 not affect the other estimates substantially, but the magnitudes of 

 the crop-specific coefficients are of interest, and they are dis- 

 cussed in chapter 5, where an attempt is made, to use these coeffi- 

 cients as "deflators" of the research variable. 



