Bibliographical references Aghion, P. and P. Howitt, (1992). “AModel ofGrowth through Creative Destruction”. Econometrica, 60: 323-351. Aghion, P. and P. Howitt, (1994). “Growth and Unemployment”. Review of Economic Studies, 61: 477-494. Aghion, P. and P. Howitt, (1998). Endogenous Growth Theory, (Cambridge, Massachusetts:MIT Press). Arrow, K. J., (1962). “The Economic Implications of Learning by Doing”, Review of Economics Studies, 29: 155-173. Barro, R. and X. Sala-i-Martin, (1995). Economic Growth, (New York: McGraw-Hill). Bean, Ch. and Ch. Pissarides, (1993). “Unemployment, Consumption and Growth”. European Economic Review, 37: 837-854. Blackburn, K. and V. T. Y. Hung, (1993). “A Theory of Growth, Financial Development and Trade”. University of Southampton Discussion Papers in Economics and Econometrics 9303. Caballero, R. J., (1993). “Comments: Unemployment, Consumption and Growth”. European Economic Review, 37: 855-859. Dixit, A. and J. E. Stiglitz, (1977). “Monopolistic Competition and Optimum Product Diversity”. American Economic Review, 67: 297-308. Ethier, W. J., (1982). “National and International Returns to Scale in the Modern Theory of International Trade”. American Economic Review, 72: 389-405. Grossman, G. M. and E. Helpman, (1991). Innovation and Growth in the Global Economy, (Cambridge, Massachusetts:MIT Press). Hammond, P. J. and A. Rodríguez-Clare, (1993). “On the Long-Run Growth”, in T. M. Andersen and K. O. Moene (eds.), Endogenous Growth, (Oxford: Blackwell). Helpman, E., (1992). “Endogenous Macroeconomic Growth Theory”. European Economic Review, 36: 237-267. Lucas, R. E. Jr., (1988). “On the Mechanics of Development Planning”. Journal of Monetary Economics, 22: 3-42. Phelps, E. S., (1968). “Money-Wage Dynamics and LaborMarket Equilibrium”, Journal of Political Economy, 76: 678-711. Pissarides, C. A., (1990). Equilibrium Unemployment Theory, (Oxford: Basil Blackwell). Rebelo, S., (1991). “Long-Run Policy Analysis and Long-Run Growth”. Journal of Political Economy, 99: 500-521. Romer, P. M., (1986). “Increasing Returns and Long-Run Growth”. Journal of Political Economy, 94: 1002-1037. Romer, P. M., (1987). “Growth Based on Increasing Returns Due to Specialization”. American Economic Review, 77: 56-62. Romer, P. M., (1990). “Endogenous Technological Change”. Journal of Political Economy, 98: S71-S102. Romer, P. M., (1994). “The Origins of Endogenous Growth”. Journal of Economics Perspectives, 8: 3-32. Sala-i- Martin, X., (1990). “Lecture Notes on Economic Growth (I): Introduction to the Literature and Neoclassical Models”. NBER working paper 3563. Sala-i- Martin, X., (1990). “Lecture Notes on Economic Growth (II): Five Prototypes Models of Endogenous Growth”. NBER working paper 3564. Sala-i-Martin, X., (1994). Apuntes de Crecimiento Economico, (Barcelona: Antoni Bosch). Uzawa, H., (1965). “Optimal Technological Change in an Aggregative Model of Economic Growth”, International Economics Review, 6: 18-31.