Verti-zontal Differentiation in Monopolistic Competition

The recent availability of trade data at a firm-product-country level calls for a new generation of models able to exploit the large variability detected across observations. By developing a model of monopolistic competition in which varieties enter preferences non-symmetrically, we show how consumer taste heterogeneity interacts with quality and cost heterogeneity to generate a new set of predictions. Applying our model to a unique micro-level dataset on Belgian exporters with product and destination market information, we find that heterogeneity in consumer tastes is the missing ingredient of existing monopolistic competition models necessary to account for observed data patterns.Heterogeneous firms, Product Differentiation, Monopolistic Competition, Nonsymmetric varieties

Verti-zontal Differentiation in Monopolistic Competition

The pattern of trade observed from firm-product-country data calls for a new generation of models. To address the unexplained variation in the data, we propose a new model of monopolistic competition where varieties enter preferences non-symmetrically, capturing both horizontal and vertical differentiation in an unprecedented way. Together with a variable elasticity of substitution, competition effects, varying markups and prices across countries, this results in a tractable model whose predictions differ from existing ones. Using the population of Belgian exporters, our model succeeds in explaining the hitherto unexplained variation. The implications call for a re-thinking of earlier results and measurement practices.Heterogeneous firms, Horizontal differentiation, Vertical differentiation, Monopolistic competition, Non-symmetric varieties

Moving up the Quality ladder? EU-China Trade Dynamics in Clothing

This paper compares European and Chinese exports in the clothing sector since the end of the Multi-Fiber Arrangement in 2005. Using detailed product-level data from UN Comtrade, we document the pattern of export prices and quantities observed for both countries, considering both exports to the rest of the world and to a particular destination market. We find that within narrowly defined product categories, European varieties typically sell for a higher price than Chinese varieties. But this price gap is narrowing. Despite rising prices, Chinese varieties are increasingly selling more than European varieties, suggesting that quality differences are narrowing. While European “core” products in clothing are stable over time, Chinese exports show strong product dynamics with exit and entry of new “core” products every year and “core” products changing rapidly. Both China and the EU export in every product category, resulting in a perfect product overlap with no products being exported by only one of the two. To make sure that our findings are not driven by a different product mix or a different destination country mix of EU versus Chinese exports, we compare EU and Chinese exports of clothing to the US and limit the comparison to HS6 product categories that are exported by both countries to the US. Again we obtain similar results as those obtained by comparing EU and Chinese exports to the rest of the world. Also, our evidence is suggestive of China exporting its high quality goods, while the EU exporting its most efficiently produced goods.

Macro-Economic Models for R&D and Innovation Policies

This report compares the modelling of R&D in four macroeconomic models used by the European Commission for ex ante policy assessment: QUEST, RHOMOLO, GEM-E3 and NEMESIS, which are. Whereas the former three are general equilibrium models, the latter is a reduced form macro-econometric model. The report highlights those parts of the models that are relevant to R&D transmission mechanisms and interfaces for implementing policy shocks.JRC.J.2-Knowledge for Growt

Modelling of Agglomeration and Dispersion in RHOMOLO

The present paper describes the strategy of modelling endogenous location taken in the newly developed dynamic spatial general equilibrium model RHOMOLO. The model incorporates three mechanisms of endogenous location: mobility of capital, mobility of labour, and vertical linkages of intermediate goods. The spatial equilibrium in RHOMOLO is an outcome of optimisation involving many dispersion/agglomeration forces and channels of adjustment.JRC.J.2-Knowledge for Growt

Vert-zonal Differentiation in Monopolistic Competition

The pattern of trade observed from firm-product-country data calls for a new generation of models. To address the unexplained variation in the data, we propose a new model of monopolistic competition where varieties enter preferences non-symmetrically, capturing both horizontal and vertical differentiation in an unprecedented way. Together with a variable elasticity of substitution, competition effects, varying markups and prices across countries, this results in a tractable model whose predictions differ from existing ones. Using the population of Belgian exporters, our model succeeds in explaining the hitherto unexplained variation. The implications call for a re-thinking of earlier results and measurement practices

Macroeconomic Modelling of R&D and Innovation Policies: An application of RHOMOLO and QUEST

This paper presents and applies a dynamic spatial computable general equilibrium model - RHOMOLO - to assess the impact of research, technological development and innovation policies in the EU. RHOMOLO is parameterised by econometrically estimating the relationship between regional productivity and R&D intensity by applying the technology catch-up model proposed by Benhabib and Spiegel (2005) to the EU-regional context. Our simulation results suggest that a dynamic spatial computable general equilibrium approach is particularly useful for handling spillovers of investments in the innovation capacity of the regions, both of which cannot be captured by models in which the spatial structure is not present. The paper shows the strengths and limitations of the approach, and the advantages of aligning the spatially and sectorally disaggregated models with more aggregated dynamic macro models.JRC.J.2-Knowledge for Growt

Verti-zontal differentiation in export markets

Many trade models of monopolistic competition identify cost efficiency as the main determinant of firm performance in export markets. To date, the analysis of demand factors has received much less attention. We propose a new model where consumer preferences are asymmetric across varieties and heterogeneous across countries. The model generates new predictions and allows for an identification of horizontal differentiation (taste) clearly distinguished from vertical differentiation (quality). Data patterns observed in Belgian firm-product level exports by destination are congruent with the predictions and seem to warrant a richer modelling of consumer demand

Transport liberalization and regional imbalances with endogenous freight rates

This paper develops a tractable two-region New Economic Geography model with footloose capital and endogenous freight rates to investigate the welfare implications and long-run industry reallocation patterns triggered by transport liberalization. Two policy scenarios are considered: one where a unique tariff per route is imposed, independently of the direction of shipment, and one of complete deregulation. Carriers in fully deregulated transport markets are shown to charge higher markups in shipments towards the periphery. This pricing behavior counterbalances the welfare-decreasing agglomeration forces associated with lowering trade costs and ensures welfare gains in both region in the short and long run.JRC.B.3 - Territorial Developmen