Samuelson asserted that Kelso's had not used any econometric analysis to arrive at his figures, which completely contradicted economists'empirical findings on the contribution of labour . " The Capitalist Manifesto " did not provide detailed calculations to support Kelso's claim, although a footnote suggested that it was based on a simple comparison with 1850s labour productivity figures.
22.
Based on an econometric analysis of time-series data for three different types of agricultural areas ( irrigated, high-potential rainfed, and low-potential rainfed ), non-ICRISAT experts found more favorable marginal returns ( measured as Indian rupees of agricultural production per additional hectare planted to modern varieties ) for crop improvement research in low-potential rainfed areas than in either high-potential rainfed areas or irrigated areas.
