COVARIANCE ANALYSIS: REVISITED AS A METHOD OF COMBINING TIME-SERIES AND CROSS-8ECTION DATA IN PRODUCTION FUNCTION ANALYSIS

In an econometrical production function analysis, It IS more desirable to use a data base consisting of a time series of cross-section samples than using either time-series or cross-section samples separately. A primary rea-son is that data of combining both types are potentially richer in informa