The Second Moment of the Pion Light Cone Wave Function

We present a preliminary result for second moment of the light cone wave function of the pion. This parameter is the subject of a discrepancy between theoretical predictions (coming from lattice and sum rules) and a recent experimental result (that remarkably agrees with purely perturbative predictions). In this work we exploit lattice hypercubic symmetries to remove power divergences and, moreover, implement a full 1-loop matching for all the contributing operators.Comment: 3 pages, proceedings of the Lattice 2002 conferenc

Trade Integration, Firm Selection and the Costs of Non-Europe

In models with heterogeneous firms trade integration has a positive impact on aggregate productivity through the selection of the best firms as import competition drives the least productive ones out of the market. To quantify the impact of firm selection on productivity, we calibrate and simulate a multi-country multi-sector model with monopolistic competition and variable markups using firm-level data and aggregate trade figures on a panel of 11 EU countries. We find that EU trade has a sizeable impact on aggregate productivity. In 2000 the introduction of prohibitive trade barriers would have caused an average productivity loss of roughly 13 per cent, whereas a reduction of intra-EU trade costs by 5 per cent would have generated a productivity gain of roughly 2 per cent. Productivity losses and gains, however, vary a lot across countries and sectors depending on market accessibility and trade costs. We provide evidence that our results are robust to alternative distance and productivity measures.European integration, firm-level data, firm selection, gains from trade, total factor productivity

Openess to trade and industry cost dispersion: Evidence from a panel of Italian firms

We use Italian firm-level data to investigate the impact of trade openness on the distribution of firms across marginal cost levels. In so doing, we implement a procedure that allows us to control not only for the standard transmission bias identified in firm-level TFP regressions but also for the omitted price bias due to imperfect competition. We find that more open industries are characterized by a smaller dispersion of costs across active firms. Moreover, in those industries the average cost is also smaller.Cost dispersion, openness to trade, firm-level data, firm selection, total factor productivity.

Additionality and regional development: are EU Structural Funds complements or substitutes of national Public Finance?

This paper deals with the effects of the transfer of additional funds on the real economy of recipient countries, in particular the European Member States. The intended and unintended effects of additional funds on national public finances and, ultimately, economic performance are discussed. Understanding the real effects of additional public funds and the possible complementarity or substitutability with national public finance is important for shaping the policies for the allocation of Structural Funds. Verification of additionality plays a role in ensuring that additional funds are used to effectively complement national expenditure programmes. In the case of the European Union, it is widely recognised that the current verification mechanism is affected by weaknesses, that prevent it from providing reliable and useful data to effectively assess additionality. For this reason, the paper suggests the European Commission to move away from the current verification approach and to adopt a new one that could more effectively assess to what extent the Structural Funds complement national investments.Public investment, substitution, displacement

Productivity and firm selection: intra- vs international trade

Recent theoretical models predict gains from international trade coming from intra-industry reallocations, due to a firm selection effect. In this paper we answer two related questions. First, what is the magnitude of this selection effect, and how does it compare to that of intra-national trade? Second, would the removal of 'behind-the-border' trade frictions between integrated EU countries lead to large productivity gains? To answer these questions, we extend and calibrate the Melitz and Ottaviano (2007) model on productivity and trade data for European economies in 2000, and simulate counterfactual trade liberalization scenarios. We consider 11 EU countries and a total of 31 economies, including 21 French regions. Our first result is that, in the French case, international trade has a sizeable impact on aggregate productivity, but smaller than that of intra-national trade. Second, substantial productivity gains (around 20%) can be expected from 'behind-the-border' integration. In both experiments, we predict the corresponding variations in average prices, markups, quantities and profits. We show that the model fits sales and exports data reasonably well, and we perform a number of robustness checks. We also suggest some explanations for the substantial cross-economy and cross-industry variations in our estimates of productivity gains, highlighting the importance of accessibility and competitiveness.European integration, intra-national trade, firm-level data, firm selection, gains from trade, total factor productivity

Productivity and Firm Selection: Quantifying the “New” Gains from Trade

We discuss how standard computable equilibrium models of trade policy can be enriched with selection effects without missing other important channels of adjustment. This is achieved by estimating and simulating a partial equilibrium model that accounts for a number of real world effects of trade liberalisation: richer availability of product varieties; tougher competition and weaker market power of firms; better exploitation of economies of scale; and, of course, efficiency gains via the selection of the most efficient firms. The model is estimated on E.U. data and simulated in counterfactual scenarios that capture several dimensions of European integration. Simulations suggest that the gains from trade are much larger in the presence of selection effects. Even in a relatively integrated economy as the E.U., dismantling residual trade barriers would deliver relevant welfare gains stemming from lower production costs, smaller markups, lower prices, larger firm scale and richer product variety. We believe our analysis provides enough ground to support the inclusion of firm heterogeneity and selection effects in the standard toolkit of trade policy evaluation.European Integration, Firm-level Data, Firm Selection, Gains from Trade, Total Factor Productivity