This paper surveys the empirical literature on export and import diversification and its linkages with growth. We review widely used measures of diversification and the evidence about their evolution focusing on how export diversification relates to trade liberalization and economic development. We also discuss the linkages between trade diversification and productivity at the firm and industry level, highlighting new advances on the linkages between import diversification and productivity.
The ‘distance effect' measuring the elasticity of trade flows to distance has been found to be rising since the early 1970s in a host of studies based on the gravity model, leading observers to call it the ‘distance puzzle'. However, this puzzle is regularly challenged by new developments in the specification of the gravity equation or in its estimations. We propose an original survey on the existing methods used to quantify the distance puzzle – basically the computation of an average distance of trade, a meta-analysis on existing gravity papers and the implementation of recent econometric developments, all on a well-specified gravity equation both in cross-section and panel data. We apply all these methods to a unique large database (124 countries from 1970 to 2006). It appears that if all these new developments can change the amplitude of the increase in the trade elasticity to distance, none solve the distance puzzle. We confirm the existence of this puzzle and identify that it only applies to low-income countries which exhibit a significant rising distance effect on their trade of around 18% between 1970 and 2006 while the distance ‘puzzle' for trade within richer countries disappears.
Least developed countries (LDCs) hoped that the DOHA round would bring them greater market access in the Organization for Economic Cooperation and Development countries than for non-LDCs. Using HS-6 tariff level data for the United States and the EU for 2004, this paper estimates that, once the erosion from preferential access into the EU to non-LDCs is taken into account, LDCs have about a 3% preferential margin in the EU market. In the US market, in spite of preferences under the African Growth and Opportunity Act(AGOA), on a trade-weighted basis, LDCs are discriminated against. Under various ‘Swiss formulas’ for tariff cuts, effective market access for LDCs in the EU will be negligible and still negative in the United States. If the United States were to apply a 97% rule (i.e, duty-free quota-free access for all but 3% of the tariff lines), LDCs could increase exports by 10% or about USD 1 billion annually. Effective market access is further reduced by complicated Rules of Origin (RoO) applied by the EU and the United States. Furthermore, generally, the most restrictive RoO fall on products in which LDCs have the greatest preferential market access.
Using an “event analysis”, this paper complements the cross-country approach to the study of fiscal correlates of growth. Data on fiscal expenditures and growth for a database of 140 countries (118 developing countries) over 1972–2005 are reorganized around turning points providing a summary but encompassing description of “what is in the data”. For this sample, the probability of occurrence of a fiscal event is about 10%, and, the probability of a growth event once a fiscal event had occurred is around 26%. For developing countries, fiscal events followed by growth events occur under situations of (i) significantly lesser deficit, (ii) fewer resources devoted to non-interest general public services and (iii) shift in primary expenditures toward transport & communication. After controlling for the growth-inducing effects of positive terms-of-trade shocks and of trade liberalization reform, probit estimates indicate that a growth event is more likely to occur in a developing country when surrounded by a fiscal event. Moreover, the probability of occurrence of a growth event in the years following a fiscal event is greater the lower is the associated fiscal deficit, confirming that success of a growth-oriented fiscal expenditure reform is associate with a stabilized macroeconomic environment (through limited primary fiscal deficit).
We study the response of regional employment and nominal wages to trade liberalization, exploiting the natural experiment provided by the opening of Central and Eastern European markets after the fall of the Iron Curtain in 1990. Using data for Austrian municipalities, we examine differential pre- and post-1990 wage and employment growth rates between regions bordering the formerly communist economies and interior regions. If the «border regions» are de fined narrowly, within a band of less than 50 km, we can identify statistically significant liberalization effects on both employment and wages. While wages responded earlier than employment, the employment effect over the entire adjustment period is estimated to be around three times as large as the wage effect. The implied slope of the regional labor supply curve can be replicated in an economic geography model that features obstacles to labor migration due to immobile housing and to heterogeneous locational preferences.
The paper explores the evolution of export diversification patterns along the economic development path. Using a large database with 156 countries over 19 years at the HS6 level of disaggregation (4,991 product lines), we look for action at the intensive and extensive margins. We find a hump-shaped pattern of export diversification similar to what Imbs and Wacziarg (2003) found for production. Diversification and subsequent reconcentration take place mostly along the extensive margin. This hump-shaped pattern is consistent with the conjecture that countries travel across diversification cones, as discussed in Schott (2003, 2004) and Xiang (2007).
Alternative approaches to estimating the effects of nontariff measures (NTMs) on trade flows are discussed and evaluated critically. Recent econometric studies point to three results: (i) NTM restrictiveness measures based on an aggregate of ‘core’ NTMs are more restrictive than existing tariffs and, because of export composition towards agricultural products, in the aggregate, these ‘core’ NTMs limit market access most for low-income countries; (ii) Proxies for individual NTMs have a negative effect on the volume of bilateral trade for the detailed product under scrutiny; (iii) harmonization of standards is trade enhancing. Case studies confirm several of these patterns, and also that perceived severity of NTMs varies across products and across destinations for a given product. Across broadly defined imports at the section level, NTMs are more restrictive than the corresponding tariffs with two-thirds of the ad-valorem equivalent estimates in the 25%-50% range. Technical regulations and non-automatic licensing are the most used single-NTM measures and the restrictiveness of technical regulations increases with income per capita.
