摘要：This study used the flexible fixed cost quadratic function to analyze the cost structure of multi-product farms using farm-level panel data. The robustness of estimated parameters are examined using four panel data estimators. Results suggest that scale economies remain significant in Illinois farming. An increase in soybean acreage reduces the marginal cost of producing corn. Firm-specific effects, that indicate the levels of fixed costs, are found to be positive and significant.
