Economic analysis of agricultural supply response frequently requires that county crop production data be combined A random coefficient regression model is used to test for aggregation bias under alternative US Department of Agnculture grouping schemes The criterion for aggregation is similarity...

Many analysts have claimed the record number of crop acres taken out of production in 1983 as a result of the Payment-in-Kind (PIK) program affected the already dechnmg sales offarm tractors The authors use intervention analysis, a particular form of a transfer function, to model and test for...