Person:
Iimi, Atsushi

Transport Global Practice

Fields of Specialization

Industrial organization, Development economics

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Transport Global Practice

Last updated: August 12, 2024

Biography

Atsushi Iimi is a Senior Economist in the Transport Global Practice of the World Bank where he specializes in development economics related to the Bank’s transport operations in Africa. He joined the World Bank in 2006 after earning a Ph.D. in economics from Brown University. Before joining the Bank, he also worked at IMF and JICA/OEFC, Japan. His research interests include spatial analysis, rural accessibility, evaluation of transport and energy projects, growth and public expenditure. His research on these topics has been published in scholarly journals, such as the Review of Industrial Economics, Journal of Urban Economics, Journal of Applied Economics, the Development Economies, and IMF Staff Papers.

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Publication Search Results

Now showing 1 - 10 of 13

Port Development and Competition in East and Southern Africa: Prospects and Challenges
(World Bank, Washington, DC, 2019-06-18) Humphreys, Martin; Stokenberga, Aiga; Herrera Dappe, Matias; Iimi, Atsushi; Hartmann, Olivier
Port Development and Competition in East and Southern Africa analyzes the 15 main ports in East and Southern Africa (ESA) to assess whether their proposed capacity enhancements are justified by current and projected demand; whether the current port management approaches sufficiently address not only the maritime capacity needs but also other impediments to port efficiency; and what the expected hierarchy of ports in the region will be in the future. The analysis confirms the need to increase maritime capacity, as the overall container demand in the ports in scope is predicted to begin exceeding total current capacity by between 2025 and 2030, while gaps in terms of dry and liquid bulk handling are expected even sooner. However, in the case of many of the ports, the issue of landside access—the ports’ intermodal connectivity, the ease of international border crossing, and the port-city interface—is more important than the need to improve maritime access and capacity. The analysis finds that there is a need to improve the operating efficiency in all of the ESA ports, as they are currently less than half as productive as the most efficient ports in the matched data set of similar ports across the world, in terms of efficiency in container-handling operations. Similarly, there is a need to improve and formalize stakeholder engagement in many of the ports, to introduce modern management systems, and to strengthen the institutional framework to ensure the most efficient use of the infrastructure and to be able to attract private capital and specialist terminal operators. Finally, given the ports’ geographic location and proximity to main shipping routes, available draft, and the ongoing port-and-hinterland development, the book concludes that Durban and Djibouti are the most likely to emerge as the regional hubs in ESA’s future hub-and-spoke system.
Estimating the Demand for Informal Public Transport: Evidence from Antananarivo, Madagascar
(World Bank, Washington, DC, 2022-04) Iimi, Atsushi
Informal public transport has been growing rapidly in many developing countries. Because urban infrastructure development tends to lag rapid population growth, informal public transport often meets the growing gap between demand and supply in urban mobility. Despite the rich literature primarily focused on formal transport modes, the informal transport sector is relatively unknown. This paper analyzes the demand behavior in the “informal” minibus sector in Antananarivo, Madagascar, taking advantage of a recent user survey of thousands of people. It finds that the demand for informal public transport is generally inelastic. Essentially, people have no other choice. While the time elasticity is estimated at −0.02 to −0.05, the price elasticity is −0.05 to −0.06 for short-distance travelers, who may have alternative choices, such as motorcycle taxi or walking. Unlike formal public transportation, the demand also increases with income. Regardless of income level, everyone uses minibuses. The estimated demand functions indicate that people prefer safety and more flexibility in transit. The paper shows that combining these improvements and fare adjustments, the informal transport sector can contribute to increasing people’s mobility and reducing traffic congestion in the city.
Spatial Analysis of Liberia’s Transport Connectivity and Potential Growth
(Washington, DC: World Bank, 2018-06-11) Rao, Kulwinder; Iimi, Atsushi
Liberia has been influenced by the Ebola crisis since 2014, but the economy is now recovering quickly. Still, significant challenges lie ahead. Agriculture, an important sector that employs approximately half of the labor force, still has a weak growth trajectory. Many rural people are not well connected to markets and live below the poverty line. To use limited resources effectively, strategic planning and prioritization of public investment are essential. Particularly, the Ebola crisis revealed the vulnerability of the country's transport connectivity and health systems. This book analyzes the country's transport connectivity, identifying the existing bottlenecks and possible economic potentials. By taking advantage of the country's first-ever georeferenced road network data, the analysis casts light on various aspects of connectivity, such as rural accessibility, market access, access to port and health facilities and multimodal connectivity, including cabotage. It is shown that transport connectivity is crucial to increasing agricultural production, stimulating agglomeration economies, and supporting people's access to health care services. Significant resources are likely to be required to meet the existing gap. The book estimates the financial needs by development objective and discusses important policy issues, including the possibility of public-private partnerships to finance transport infrastructure.
Procurement Efficiency for Infrastructure Development and Financial Needs Reassessed
(World Bank, Washington, DC, 2008-07) Estache, Antonio; Iimi, Atsushi
Infrastructure is the engine for economic growth. The international donor community has spent about 70-100 billion U.S. dollars on infrastructure development in developing countries every year. However, it is arguable whether these financial resources are used efficiently, particularly whether the current infrastructure procurement prices are appropriate. Without doubt a key is competition to curb public procurement costs. This paper analyzes procurement data from multi and bilateral official development projects in three infrastructure sectors: roads, electricity, and water and sanitation. The findings show that the competition effect is underutilized. To take full advantage of competition, at least seven bidders are needed in the road and water sectors, while three may be enough in the power sector. The paper also shows that not only competition, but also auction design, especially lot division, is crucial for reducing unit costs of infrastructure. Based on the estimated efficient unit costs, the annual financial needs are estimated at approximately 360 billion U.S. dollars. By promoting competition, the developing world might be able to save at most 8.2 percent of total infrastructure development costs.
Price Structure and Network Externalities in the Telecommunications Industry : Evidence from Sub-Saharan Africa
(World Bank, Washington, DC, 2007-04) Iimi, Atsushi
Many developing countries have experienced significant developments in their telecommunications network. Countries in Africa are no exception to this. The paper examines what factor facilitates most network expansion using micro data from 45 fixed-line and mobile telephone operators in 18 African countries. In theory the telecommunications sector has two sector-specific characteristics: network externalities and discriminatory pricing. It finds that many telephone operators in the region use peak and off-peak prices and termination-based price discrimination, but are less likely to rely on strategic fee schedules such as tie-in arrangements. The estimated demand function based on a discreet consumer choice model indicates that termination-based discriminatory pricing can facilitate network expansion. It also shows that the implied price-cost margins are significantly high. Thus, price liberalization could be conducive to development of the telecommunications network led by the private sector. Some countries in Africa are still imposing certain price restrictions. But more important, it remains a policy issue how the authorities should ensure reciprocal access between operators at reasonable cost.
Effects of Improving Infrastructure Quality on Business Costs : Evidence from Firm-Level Data
(World Bank, Washington, DC, 2008-03) Iimi, Atsushi
Economic development is affected by infrastructure services in both volume and quality terms. However, the quality of infrastructure is relatively difficult to measure and assess. The current paper, using firm-level data collected by a business environment assessment survey in 26 countries in Europe and Central Asia, estimates the marginal impacts on firm costs of infrastructure quality. The results suggest that the reliability or continuity of services is important for business performance. Firm costs significantly increase when electricity outages occur more frequently and the average outage duration becomes longer. Similarly, increased hours of water supply suspensions also reduce firms' competitiveness. In these countries, it is found that the total benefit for the economy from eliminating the existing electricity outages ranges from 0.5 to 6 percent of gross domestic product. If all water suspensions are removed, the economy could receive a gain of about 0.5 to 2 percent of gross domestic product. By contrast, the quality of telecommunications services seems to have no significant impact.
Estimating the Impacts of Transport Corridor Development in Kazakhstan: Application of Dynamic Panel Data Models to Firm Registry Data
(World Bank, Washington, DC, 2022-09) Iimi, Atsushi
Large-scale transport infrastructure investment can facilitate structural transformation by changing firm behavior. Although its impact is evident over the long term, an important empirical challenge is potential endogeneity of infrastructure placement. By using the dynamic panel data regression, the paper examines the impacts of massive road corridor investment under the Nurly Zhol program in Kazakhstan. The paper takes advantage of detailed micro shipping data to capture historical changes in transport connectivity over the past 10 years. While the average travel speed has slightly increased, transport costs have been nearly halved. The estimated translog cost functions indicate that local market accessibility is the most important factor to boost firm productivity. The elasticity was 0.24 in absolute terms. Inventory is found to be a major cost factor for firms. It is found that a 10-percent improvement in accessibility to large cities, such as Astana and Almaty, could allow firms to reduce their inventory by 8.7 percent. The market accessibility is found to foster firm agglomerations, but agglomeration economies do not seem to translate into higher firm productivity. This is possibly because the Kazakh economy still lacks effective forward or backward linkages across industries.
Multidimensionality and Renegotiation : Evidence from Transport-Sector Public-Private-Partnership Transactions in Latin America
(World Bank, Washington, DC, 2008-07) Estache, Antonio; Guasch, Jose-Luis; Iimi, Atsushi; Trujillo, Lourdes
Multidimensional auctions are a natural and practical solution when auctioneers pursue more than one objective in their public-private-partnership transactions. However, it is difficult to achieve auction efficiency with multiple award criteria. Using auction data from road and railway concessions in Latin America, the probability of renegotiation this paper estimates by a two-stage least squares technique with a binary selection in the first-stage regression. The findings show that auctioneers tend to adopt the multidimensional format when the need for social considerations, such as alleviation of unemployment, is high. This implies that such political considerations could hinder efficiency and transparency in auctions. The analysis also shows that the renegotiation risk in infrastructure concessions increases when multidimensional auctions are used. Rather, good governance, particularly anti-corruption policies, can mitigate the renegotiation problem.
Firm Productivity and Infrastructure Costs in East Africa
(World Bank, Washington, DC, 2015-06) Humphrey, Richard Martin; Iimi, Atsushi; Melibaeva, Sevara
Infrastructure is an important driving force for economic growth. It reduces trade and transaction costs and stimulates the productivity of the economy. Africa has been lagging behind in the global manufacturing market. Among others, infrastructure is an important constraint in many African countries. Using firm-level data for East Africa, the paper reexamines the relationship between firm performance and infrastructure. It is shown that labor costs are by far the most important to stimulate firm production. Among the infrastructure sectors, electricity costs have the highest output elasticity, followed by transport costs. In addition, the paper shows that the quality of infrastructure is important to increase firm production. In particular, quality transport infrastructure seems to be essential. The paper also finds that agglomeration economies can reduce firm costs. The agglomeration elasticity is estimated at 0.03–0.04.
Crop Choice and Infrastructure Accessibility in Tanzania: Subsistence Crops or Export Crops?
(World Bank, Washington, DC, 2015-06) Melibaeva, Sevara; Iimi, Atsushi; Humphreys, Richard Martin
Africa has great potential for agriculture. Although international commodity prices have been buoyant, Africa’s supply response seems to be weak. A variety of constraints may exist. Using the case of Tanzania, the paper examines the impact of market connectivity, domestic and international, on farmers’ crop choices. It is shown that the international market connectivity, measured by transport costs to the maritime port, is important for farmers to choose export crops, such as cotton and tobacco. Internal connectivity to the domestic market is also found to be important for growing food crops, such as maize and rice. Among other inputs, access to irrigation and improved seed availability are also important factors in the crop choices of farmers. The size of land area is one constraint to promote the crop shift. The paper also reports the finding that farmers are not using market prices effectively in their choice of crop, even after the endogeneity of local prices is taken into account.