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The determinants of agricultural production : a cross-country analysis

  • Mundlak, Yair
  • Larson, Don
  • Butzer, Ritz

In this analysis of capital's role in agricultural production, a new construction of data on capital allowed the authors to advance the cross-country study of production functions. The model reveals the relative importance of capital, a finding quite robust to modifications of the model and the disaggregation of capital to its two components. The model is also consistent with the view that lack of physical capital serves as a constraint on agricultural growth. The shift to more productive techniques is associated with a decline in labor, reflecting labor-saving technical changes. This is not news, but it is emphasized here because it comes out an integral view of the process which distinguishes between the core technology and the changes that took place over time and between countries. Not only is capital important to agricultural production, and agricultural development dependent on the economic environment, but agriculture is more cost-capital-intensive than nonagriculture. Capital is all the more important as a factor of production in that land (also important) varies little over time. The availability of agricultural capital determines whether the gap between available and applied technologies can be closed. Prices have little direct, immediate impact on agricultural growth, beyond their impact through inputs and choice of technology. The legacy of past policies that distorted the relative returns to economic activity is enshrined in current stocks, which may respond slowly to policy reform. The analysis assumes that the production technology is heterogeneous and the implemented technology is endogenous and determined jointly with the level of unconstrained inputs. Thus, a change in the state variables affects both the technology and the inputs, so the production function is not identified. To overcome that problem, changes in productivity are decomposed to three orthogonal components caused by the fundamentally different processes underlying panel data. The statistical framework explains the unstable results observed in production functions derived from panel data. Statistically, the results depend on how the data are projected. Comparisons between units over time or of deviations from unit-means or time-means all describe different processes. This is based on theory but has an intuitive appeal as well. In this case, the spread in productivity among countries is different from the spread in productivity for a country through time. The factors explaining the spread will differ. The modeling approach should explicitly recognize the fact that panel data measure a combination of economic phenomena.

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Paper provided by The World Bank in its series Policy Research Working Paper Series with number 1827.

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Date of creation: 30 Sep 1997
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Handle: RePEc:wbk:wbrwps:1827
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  1. Nehru, Vikram & Swanson, Eric & Dubey, Ashutosh, 1993. "A new database on human capital stock : sources, methodology and results," Policy Research Working Paper Series 1124, The World Bank.
  2. Saburo Yamada & Vernon W. Ruttan, 1980. "International Comparisons of Productivity in Agriculture," NBER Chapters, in: New Developments in Productivity Measurement, pages 507-594 National Bureau of Economic Research, Inc.
  3. Hayami, Yujiro & Ruttan, Vernon W, 1970. "Agricultural Productivity Differences Among Countries," American Economic Review, American Economic Association, vol. 60(5), pages 895-911, December.
  4. Antle, John M, 1983. "Infrastructure and Aggregate Agricultural Productivity: International Evidence," Economic Development and Cultural Change, University of Chicago Press, vol. 31(3), pages 609-19, April.
  5. Maddala, G S, 1971. "The Use of Variance Components Models in Pooling Cross Section and Time Series Data," Econometrica, Econometric Society, vol. 39(2), pages 341-58, March.
  6. Mundlak, Yair, 1993. "On the Empirical Aspects of Economic Growth Theory," American Economic Review, American Economic Association, vol. 83(2), pages 415-20, May.
  7. Pritchett, Lant, 1996. "Where has all the education gone?," Policy Research Working Paper Series 1581, The World Bank.
  8. Ball, V Eldon, et al, 1993. "The Stock of Capital in European Community Agriculture," European Review of Agricultural Economics, Foundation for the European Review of Agricultural Economics, vol. 20(4), pages 437-50.
  9. Crego, Al & Larson, Donald & Butzer, Rita & Mundlak, Yair, 1998. "A new database on investment and capital for agriculture and manufacturing," Policy Research Working Paper Series 2013, The World Bank.
  10. Kawagoe, Toshihiko & Hayami, Yujiro & Ruttan, Vernon W., 1985. "The intercountry agricultural production function and productivity differences among countries," Journal of Development Economics, Elsevier, vol. 19(1-2), pages 113-132.
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