This article describes ways to use original texts in the National Russian Corpus as well as news texts for teaching Russian as a foreign language. Two-year work of a scientific group of Higher School of Economics (Nizhny Novgorod-Moscow), which is called CorpLings is analyzed. Special attention...

Studying the standard monopolistic competition model with unspecified utility/cost functions, we find necessary and sufficient conditions on the function elasticities, when an expanding market or trade incur welfare losses. Two numerical examples explain why: either excessive or insufficient...

We develop a two-factor, two-sector trade model of monopolistic competition with variable elasticity of substitution. Firms' profits and sizes may increase or decrease with market integration depending on the degree of asymmetry between countries. The country in which capital is relatively...

We explore the impact of reciprocal, specific or ad valorem, import tariffs on welfare among N symmetric countries (a free-trade agreement)—using the standard Krugman’s one-sector trade model, with unspecified variable-elasticity preferences (mostly under decreasing elasticity of utility)....

Our new approach enriches the general additive monopolistic competition model (AMCM) - with a space of product characteristics: consumers' "ideal varieties". Unlike Hotelling, such partially localized competition involves intersecting zones of service among (continuously distributed) producers....

In the standard Krugman (1979) non-CES trade model, several asymmetric countries typically lose from increasing trade costs. However, all countries transiently benefit from such increase at the moment of closing trade, under almost-prohibitive trade costs (i.e., near autarky, which is possible...

We show that a market involving a handful of large-scale firms and a myriad of small-scale firms may give rise to different types of market structure, ranging from monopoly or oligopoly to monopolistic competition through new types of market structure. In particular, we find conditions under...