“The Nature and Growth of Vertical Specialization in World Trade.” Journal of International Economics 54 (1): 75–96. Johnson, R.C. and G. Noguera. 2012. “Proximity and Production Fragmentation.” American Economic Review 102 (3): 407–411. Kaplan, G. and G.L. Violante. 2014. “A Model of the Consumption Response to Fiscal Stimulus Payments.” Econometrica 82 (4): 1199–1239. Kehoe, T.J. and K.J. Ruhl. 2013.
“How Important Is the New Goods Margin in International Trade?” Journal of Political Economy 121(2): 358–92. Krugman, P. 1980. “Scale Economies, Product Differentiation, and the Pattern of Trade.” American Economic Review 70 (5): 950–959. —. 2008. “Trade and Wages, Reconsidered.” Brookings Papers on Economic Activity 39 (1)(Spring): 103–154. Liao, W. and A.-M. Santacreu. 2015.