In the standard horizontal innovation model of endogenous growth, larger economies innovate more and grow faster. Due to the homotheticity of preferences, however, it does not matter whether the large market size comes from a large population or a high per capita expenditure. In this paper, we...

I propose a theoretical framework for studying the effects of geographical factors on the distribution of industries across many regions. The geographical feature of each region is summarized by a proximity matrix, whose elements measure the closeness between every pair of regions and depend on...

Endogenous demand composition across sectors due to nonhomothetic demand (Engel's Law) affects i) sectoral compositions in employment and in value-added, ii) variations in innovation rates and in productivity change across sectors, iii) intersectoral patterns of trade across countries, and iv)...

We characterize three classes of demand systems, all of which are defined nonparametrically: homothetic demand systems with a single aggregator (HSA), those with direct implicit additivity (HDIA), and those with indirect implicit additivity (HIIA). For any number of goods, all the cross-price...