The paper analyses the patterns of demographic dynamics of settlements and districts of various types in Russia within the framework of the core-periphery model. We test the hypotheses stating that population density is growing in regional centres and in their surroundings; variations in the...

Phosphates (P) are an important nutrient required by every living plant and animal cell, and deficiencies in soils could cause limited crop production, thereby reducing profitability. Phosphates are also a primary nutrient essential for root development and crop production, and are needed in the...

This study uses a unique natural experiment to test a simple model of international differences in workers’ wages and productivity. Large differences in wages across countries could arise from several sources. These include barriers to trade in outputs, differences in technology, differences...