Alston, J., J.M. Beddow, and P. Pardey. 2009. "Agricultural Research, Productivity, and Food Prices in the Long Run," Science 325(5945):1209-1210.

Ball, V.E., C. San Juan Mesonada, and C.A. Ulloa. 2014. “State Productivity Growth in Agriculture: Catching-up and the Business Cycle,” Journal of Productivity Analysis 42(3):327-338.

Ball, V.E., J-P. Butault, C. San Juan Mesonada, and R. Mora. 2010. "Productivity and International Competitiveness of European Union and United States Agriculture, 1973-2002," Agricultural Economics 41(6):611-627.

Ball, V.E., W. Lindamood, R. Nehring, and C. San Juan Mesonada. 2008. "Capital as a Factor of Production in OECD Agriculture: Measurement and Data," Applied Economics 40(10):1253-1277.

Ball, V.E., C. Hallahan, and R. Nehring. 2004. "Convergence of Productivity: An Analysis of the Catch-up Hypothesis within a Panel of States," American Journal of Agricultural Economics 86(5):1315-1321.

Ball, V.E., J-C. Bureau, J-P. Butault, and R. Nehring. 2001. "Levels of Farm Sector Productivity: An International Comparison," Journal of Productivity Analysis 15(1):5-29.

Ball, V.E., F. Gollop, A. Kelly-Hawke, and G. Swinand. 1999. "Patterns of State Productivity Growth in the U.S. Farm Sector: Linking State and Aggregate Models," American Journal of Agricultural Economics 81(1):164-179.

Ball, V.E., J-C. Bureau, R. Nehring, and A. Somwaru. 1997. "Agricultural Productivity Revisited," American Journal of Agricultural Economics 79(4):1045-1063.

Barro, R., and X. Sala-i-Martin. 1992. "Convergence," Journal of Political Economy 100(2):223-251.

Caves, D.W., L.R. Christensen, and W.E. Diewert. 1982. "Multilateral Comparisons of Output, Input, and Productivity Using Superlative Index Numbers," The Economic Journal 92(365):73-86.

Christensen, L.R., and D.W. Jorgenson. 1969. "The Measurement of U.S. Real Capital Input, 1929-1967," Review of Income and Wealth 15(4):293-320.

Chow, G.C. 1960. "Tests of Equality Between Sets of Coefficients in Two Linear Regressions," Econometrica 28(3):591-605.

Coen, R.M. 1975. "Investment Behavior, the Measurement of Depreciation, and Tax Policy," American Economic Review 65(1):59-74.

Denison, E.F. 1979. "Explanations of Declining Productivity Growth," Survey of Current Business 59(8):1-24.

Dicky, D.A., and W.A. Fuller. 1979. "Distribution of the Estimates for Autoregressive Time Series With a Unit Root, Journal of the American Statistical Association 74(366):427-431.

Diewert, W.E. 1980. "Aggregation Problems in the Measurement of Capital," in The Measurement of Capital, Studies in Income and Wealth No. 45, D. Usher, ed. Chicago, IL: The University of Chicago Press.

Diewert, W.E. 1976. "Exact and Superlative Index Numbers," Journal of Econometrics 4(2):115-146.

Elliot, G., U.K. Muller. 2006. "Efficient Tests for General Persistent Time Variation in Regression Coefficients," Review of Economic Studies 73(4):907-40.

Eltetö, O., and P. Köves. 1964. "On an Index Computation Problem in International Comparisons," Statisztikai Szemle 42():507-18.

Eswaren, H., F. Beinroth, and P. Reich. 2003. "A Global Assessment of Land Quality," in Land Quality, Agricultural Productivity, and Food Security, K. Wiebe, ed. Cheltenham, UK: Edward Elgar Publishing.

Gerschenkron, A. 1952. "Economic Backwardness in Historical Perspective," in The Progress of Underdeveloped Areas, B.F. Hoselitz, ed. Chicago, IL: University of Chicago Press.

Jorgenson, D.W., M. Ho, and K. Stiroh. 2005. Productivity: Information Technology and the American Growth Resurgence. Cambridge, MA: The MIT Press.

Jorgenson, D.W., and F. Gollop. 1992. "Productivity Growth in U.S. Agriculture: A Postwar Perspective," American Journal of Agricultural Economics 74(3):745-750.

Jorgenson, D.W., F. Gollop, and B. Fraumeni. 1987. Productivity and U.S. Economic Growth. Cambridge, MA: Harvard University Press.

Jorgenson, D.W., and Z. Griliches. 1967. "The Explanation of Productivity Change," Review of Economic Studies 34(3):249-283.

Kellogg, R., R. Nehring, A. Grube, D. Goss, and S. Plotkin. 2002. "Environmental Indicators of Pesticide Leaching and Runoff from Farm Fields," in Agricultural Productivity: Measurement and Sources of Growth, V.E. Ball, and G. Norton, eds. Boston, MA: Kluwer Academic Publishers.

Kendrick, J.W., and E.S. Grossman. 1980. Productivity in the United States, Trends and Cycles. Baltimore, MD: The Johns Hopkins University Press.

McCunn, A., and W.E. Huffman. 2000. "Convergence in U.S. Productivity Growth for Agriculture: Implications of Interstate Research Spillovers for Funding Agricultural Research,” American Journal of Agricultural Economics 82(2):370-388.

Kwiatkowski, D., P.C.B. Phillips, P. Schmidt, and Y. Shin. 1992. "Testing the Null Hypothesis of Stationarity Against the Alternative of a Unit Root," Journal of Econometrics 54(1-3):159-78.

Penson, J.B., D.W. Hughes, and G.L. Nelson. 1977. "Measurement of Capacity Depreciation Based on Engineering Data," American Journal of Agricultural Economics 59(2):321-329.

Phillips, P.C.B., and P. Perron. 1988. "Testing for a Unit Root in Time Series Regression," Biometrika 75(2):335-346.

Romain, R., J.B. Penson, and R. Lambert. 1987. "Capacity Depreciation, Implicit Rental Prices, and Investment Demand for Farm Tractors in Canada," Canadian Journal of Agricultural Economics 35(2):373-378.

Rosen, S.M. 1974. "Hedonic Prices and Implicit Markets: Product Differentiation in Pure Competition," Journal of Political Economy 82(1):34-55.

Shumway, C.R., B.M. Fraumeni, L.E. Fulginiti, J.D. Samuels, and S.E. Stefanou. 2014. "Measurement of U.S. Agricultural Productivity: A 2014 Review of Current Statistics and Proposals for Change," a report to the Administrator, U.S. Department of Agriculture, Economic Research Service, September.

Szulc, B. 1964. "Indices for Multiregional Comparisons," Przegląd Statystyczny 3:239-54.

Wang, S.L., D. Carrol, R. Nehring, and C. McGath.  2013. “ The Shadow Value of Legal Status—A Hedonic Analysis of the Earnings of U.S. Farm Workers,” conference paper, 2013 Annual Meeting, Agricultural and Applied Economics Association, Washington, DC, August.

Zivot, E., and D. Andrews. 1992. "Further Evidence on the Great Crash, the Oil-Price Shock, and the Unit-Root Hypothesis," Journal of Business & Economic Statistics 10(3):251-270.