Regulation of international roaming in the European Union—Lessons learned

This paper analyzes the evolution of prices and competition in intra-EU international roaming markets. It addresses three main research questions: (i) to what extent have market forces by themselves brought competition to retail roaming markets? (ii) Has the evolution of market dynamics in wholesale roaming improved competition? (iii) Is wholesale regulation sufficient to lead to a reduction in retail roaming prices? Data show that there has been little price-based competition both at wholesale and retail levels, despite prices being well above costs and the significant margins allowed by regulation. Available data from the period preceding the entry into force of the first EU roaming regulation also point to the same conclusion. Lack of competitive pressure in retail roaming markets and inelastic demand give little incentives for retail roaming service providers to lower prices. Wholesale international roaming markets have complex competition dynamics. They are characterized by the reciprocity of wholesale roaming agreements and traffic internalization inside transnational groups. These circumstances limit price competition at the wholesale level. The traditional regulatory approach applied to electronic communication markets has been primarily focused on wholesale regulation. However, empirical evidence shows that even if wholesale charges are reduced, retail roaming markets continue to operate at very high retail margins (for example, more than 200% retail mark-up over wholesale charges for data roaming services and incoming calls). This proves that in international roaming markets wholesale charge reductions are not necessarily passed on to retail prices. It can thus be inferred that wholesale price regulation alone is in most cases not sufficient to ensure that benefits are passed through to end users.     

Fertilizer market liberalization and private retail trade in Kenya

This paper examined the factors influencing the entry and sales decision of private traders in fertilizer retail trade in a liberalized market using survey data from Kenya. A two-stage econometric model is used to examine traders’ entry and sales decision. The results provide insights into factors that are associated with private retail traders’ entry and sales decisions in an era of liberalized fertilizer markets. It shows substantial entry into fertilizer retail trade following market liberalization. Relatively limited investments in trading assets and equipment are predicted to hold back firm expansion. Implications drawn from the study provide insights into likely research and policy interventions.     

The effect of competition on pricing and product positioning: Evidence from wholesale club entry

This paper empirically examines incumbents’ reactions to market entry along price and non-price dimensions in the example of wholesale warehouse entry into grocery retail markets. Leveraging a detailed retail panel spanning 2001–2011 and a novel dataset documenting opening and closing dates and locations of all Costco warehouse clubs, we classify incumbent retailers’ strategic responses (e.g., pricing, assortment) by the storability of product categories, controlling for persistent systematic differences across retailer–product combinations. We find that retailers are substantially affected by increased competition from wholesale club warehouse openings and in response increase the variability of their prices, consistent with adoption of the Hi–Lo pricing strategy. In addition, incumbent retailers’ strategic responses differ significantly across storability levels: They are more likely to increase prices and reduce assortments for highly storable products and decrease prices and increase assortments for less storable products. We extend our analysis by exploiting the spatial variations in our data and analyzing divergent market effects across geographical areas. We find significant geospatial differences in these strategic responses.     

RETAIL GASOLINE PRICE DYNAMICS AND LOCAL MARKET POWER*

Using monthly data from the 48 contiguous states (except Nevada) for the 1988–2002 period, it is shown that retail gasoline prices respond faster to wholesale price increases than to equivalent wholesale price decreases. Moreover, markets with high average retail‐wholesale margins experience a slower adjustment and a more asymmetric response. Since gasoline is the only variable input, average margins in a state likely reflect the degree of retail market power. This suggests that sticky prices and response asymmetries in the gasoline market are, at least partially, a consequence of retail market power.     

Consequences of unintended food policies: Food price dynamics subject to the Israeli–Palestinian conflict

Israel’s imposition of military security measures in the Palestinian territories as a consequence of the long-lasting violent conflict between them has negative economic effects on all parties concerned. One crucial outcome is the limited ability to carry out trade, which brings about welfare losses. Conflict-induced policies such as security measures can result in sizable unintended externalities that shape the markets of and the trade in food. We assess the dynamics of daily wholesale prices of food produced in Israel and the West Bank that is traded between them and is therefore subject to restrictions on movement. To do so, we suggest a regime switching cointegration model which is estimated using a novel extension of the Johansen estimation method. We find that the two major wholesale markets of the two regions are integrated with regard to these main trading products. Deviations from price equilibria are quickly adjusted. The model suggests that movement restrictions temporarily cut off markets from each other. Implications of conflict-induced closures for welfare depend on the direction of trade and are harming both Palestinian and Israeli consumers.     

Structural separation versus vertical integration: Lessons for telecommunications from electricity reforms

Structural separation between network and retail functions is increasingly being mandated in the telecommunications sector to countervail the market power of incumbent operators. Experience of separation in the electricity sector offers insights for policy-makers considering telecommunications reforms. Despite apparent competitive benefits, the costs of contracting increase markedly when short-term focused electricity retail operations are separated from longer-term generation infrastructure investments (which require large up-front fixed and sunk cost components). The combination of mismatches in investment horizons, entry barriers, and risk preference and information asymmetries between generators and retailers leads to thin contract markets, increased hold-up risk, perverse wholesale risk management incentives, and bankruptcies. Direct parallels in the telecommunications sector indicate exposure to similar complications, intensifying many of the contractual risks arising from regulated access arrangements. Thus, as in electricity, competition between vertically integrated telecommunications providers would likely induce more efficient and sustainable investment and competition than would separation.     

Vertical Contracts and Downstream Entry*

We study the implications of different contractual forms in a market with an incumbent upstream monopolist and free downstream entry. We show that traditional conclusions regarding the desirability of linear contracts radically change when entry in the downstream market is endogenous rather than exogenous. By triggering more entry than two-part tariffs, wholesale price contracts can generate higher aggregate output, consumer surplus, and welfare. In light of this, the upstream monopolist may prefer to trade with wholesale price contracts as well as to give up part of its bargaining power when it is high.     

Wholesale market definition in telecommunications: The issue of wholesale broadband access

The scope of a wholesale market may, in addition to demand- and supply-side substitution at the wholesale level, also be determined by substitution patterns at the retail level. Considering wholesale broadband access markets, it is argued that each of these forces can be strong enough to render a 5–10% price increase by a hypothetical monopolist at the wholesale level unprofitable and thus may lead to a wider wholesale market definition including, for example, cable networks in addition to DSL. Based on the theory of derived demand elasticities the paper discusses under which circumstances this could be the case. The position of the European Commission and the practice of national regulatory authorities are then reviewed in light of these arguments.     

The Welfare Losses From Price-Matching PolicIes

Several recent papers argue that price-matching policies raise equilibrium prices. We add to this literature by considering potential welfare losses, which have two sources: Harberger triangles from high prices and Posner rectangles from over-entry. We compare price-matching markets with entry to monopoly and price-matching markets without entry, and find that price matching with entry creates greater welfare losses than monopoly in markets with a low ratio of fixed to marginal cost. We illustrate this result using parameters from the US wholesale gasoline and air travel markets, and relate our model to price matching among NASDAQ market makers.     

The need for a new approach to regulating fixed networks

The increasing danger of excess capacity in the regulated fixed networks calls into question the established long-standing pricing standards for wholesale services based on forward-looking long-run incremental costs (FL-LRAIC). Within the EU “Regulatory Framework for Electronic Communications and Services”, the FL-LRAIC standard has worked quite well in expanding markets, although even there price-squeeze problems have appeared. In contracting markets the price-squeeze issue, however, becomes paramount and lower prices both at the wholesale and retail levels would be efficient. Because both expansion and contraction could be relevant in the future, this paper suggests an optional approach based on the wholesale price formula p=min{FL-LRAIC, Retail-Minus} with an optional replacement of per-minute charges by capacity-based access charges (CBC). This will generally protect alternative competitors against price-squeeze while at the same time allowing the fixed-network incumbent full downward price flexibility. It also protects alternative competitors and end users against excessively high prices.     

中国服务贸易推动经济增长效应研究——基于两阶段时间序列数据的实证分析

服务贸易的日益快速增长是我国入世后服务贸易的特点之一。本文通过引入贸易竞争指数,对入世前后两个阶段的服务贸易与经济增长关系进行实证的比较分析,以寻求对入世前后两个不同阶段的经济增长效应分析。分析结果说明入世以来我国对外服务贸易受到的冲击较大。对此,文章将发挥静态比较优势和培育动态比较优势相结合,就服务贸易对经济增长的推动作用提出了可行的政策建议。     

Trade subsidies,export bans and price stabilization: Lessons of Bangladesh–India rice trade in the 2000s

During the world food price crisis of 2007–08, rice importing countries suffered through a sharp increase in international rice prices and disruptions in supply as several rice exporters restricted trade to mitigate their domestic price increases. Perhaps no country was more affected by these disruptions than Bangladesh. Our analysis shows that prior to the 2007 crisis, when Bangladesh imported an average of nearly 1 million tons of rice per year from India, domestic wholesale prices of rice in Bangladesh were co-integrated with import parity prices of subsidized Below Poverty Line (BPL) rice. When in mid-2007, India sharply curtailed exports, rice prices surged in Bangladesh.Model simulations show that a relatively small increase in private consumer stocks equivalent to about 2 weeks of normal consumption could account for the large surge in domestic prices in Bangladesh and that an additional 300,000 tons (in addition to approximately 700,000 tons of net rice distribution that actually occurred) would have been sufficient to stabilize prices in the November 2007–April 2008 period. The Bangladesh analysis thus shows that in spite of the uncertainty in international markets, careful planning, timely interventions and openness to trade can substantially reduce requirements for public stockholding.     

Multiproduct Outputs and Scale Economies in Electric Power Production: Some New Estimates

The present study offers an argument, through a technical exposition, which suggests that there are cost differences inherent in serving different types of buyers in the electric utilities industry. To this end, we employ a translog joint cost function (for electricity production) with three outputs, which allows for the examination of the cost differences between wholesale and retail trade for vertically integrated, investor-owned companies in the industry. The regression estimates suggest different costs at the means, however the estimated marginal cost curve for wholesale power is not as robust as those for low-voltage and industrial power.     

The US fashion industry: A supply chain review

The fashion industry has short product life cycles, tremendous product variety, volatile and unpredictable demand, and long and inflexible supply processes. These characteristics, a complex supply chain and wide availability of data make the industry a suitable avenue for efficient supply chain management practices. The industry has also been in a transition over the last 20 years: significant consolidation in retail, majority of apparel manufacturing operations moving overseas and, more recently, increasing use of electronic commerce in retail and wholesale trade. This paper aims to review the current state of operations and recent trends across the fashion supply chain in the US. We use industry-wide data, articles from business journals, industry reviews and extensive interviews with an apparel manufacturer in California, and a major US department store chain to describe the current operational practices and how the industry is restructuring itself during the transition, focusing at the apparel manufacture and retail segments of the supply chain.     

Search Costs, Lags and Prices at the Pump

Evidence is mounting that long lags and asymmetric price responses to changes in wholesale prices are characteristic of many retail markets. Although long lags are often attributed to search costs, little empirical evidence exists to support this claim. The analysis offered in this paper compares price responses in gasoline and diesel markets in 15 U.S. cities. Search costs vary across these two markets, and the evidence indicates a much faster response in the diesel market where search costs are lower. Asymmetric responses, where prices rise faster than they fall, are also evident in the data. While asymmetric responses have been attributed to oligopolistic behavior, the arguments presented in this paper point to search theory as an alternative explanation.     

加入WTO与中国机电行业对外贸易

围绕中国加入WTO，本文首无对机电行业的“入世”背景 内行业间的动态比较分析和国际行业内的静态比较分析。然后结合WTO的相关要款，分析加入WTO对机电行业对外贸易发展的主要影响。根据机电行业发展的现状以及“入世”可能造成的影响，本文给出了机电行业对外贸易进一步发展的政策建议。     

Agro-food trade competitiveness of Central European and Balkan countries

This paper investigates the level, composition, and differences in agro-food relative trade advantages/disadvantages for eight Central European and Balkan countries on the European Union (EU) markets and their implications for food policy. Higher and more stable relative trade advantages are found for bulk primary raw agricultural commodities and less for consumer-ready foods, implying competitiveness shortcomings in food processing and in international food marketing. Duration analysis shows that the EU enlargement has a negative impact on agro-food relative trade advantages for all eight analyzed countries. Estimations imply that the duration of agro-food relative trade advantages are the highest for Hungary and Poland, and for Bulgaria in differentiated products, indicating their agro-food trade potentials in the EU-15 markets.     

Union Wage Effects in Nevada's Hotel and Casino Industry

I use the significant union presence in Las Vegas's hotel, gaming, andrecreation (HGR) industry juxtaposed to the near absence of unions in Reno's HGR sector to study union wage effects. I find wages of highly unionized occupations in Las Vegas's HGR industry to be significantly higher than wages of identical occupations in Reno. Furthermore, I detect little impact from Las Vegas's HGR unions on wages in the wholesale and retail trade (WRT) industry, a much less unionized sector.     

Productivity Dynamics and the Role of ‘Big‐Box’ Entrants in Retailing

We use a dynamic model to measure the impact of the entry of large stores on incumbents’ productivity separate from demand while accounting for local markets and the endogeneity of entry. Using data on all retail food stores in Sweden, we find that incumbents’ productivity increases after the entry of large stores and that the magnitude of the increase declines toward the upper part of the productivity distribution. Our findings highlight that large entrants drive productivity.     

The competitive effects of resale versus facility-based entry: evidence from the long-distance market

This paper examines the ability of entry by either resellers or facilities-based carriers to discipline the pricing behavior of a vertically integrated incumbent supplier. Theoretical considerations suggest that, once a sufficient amount of entry has occurred at both vertical stages—transmission and retail functions—additional entry at either stage can push final output toward the competitive level. Under these conditions, entry at either stage may serve as a gross complement or substitute for entry at the other stage. Data from the interLATA telecommunications market are used to test the relevant hypotheses. Our findings are not expected to be directly applicable to the local exchange and electricity markets as those markets are currently constituted. When these industries begin to exhibit structural characteristics that resemble the long-distance market, however, our findings should become relevant there as well.