Abstract

Like in many large cities in developing countries, traffic in Grand Casablanca, Morocco, is congested and public buses are crowded. These conditions are alleviated by a combination of supply-side infrastructure expansions, such as more buses and new road capacity, and demand-side pricing instruments, such as parking and fuel taxes. Using an empirical urban transportation mode choice model for Casablanca, this study finds a mix of these expansion policies and pricing instruments to alleviate congestion and maximize aggregate social welfare. The optimal mix is sensitive to the marginal costs of the infrastructure expansions. If the city were to spread out in its periphery where land constraints do not exist and land is available at lower prices, a supply-side instrument, particularly the optimal expansion of roads, would be far more effective in achieving welfare gains than the use of optimal pricing instruments without new roads. By contrast, if the city were to densify in already built-up areas, land and other physical constraints and the high price of land may leave expensive “elevated roads” as the only option. In this case, demand-side instruments together with the elevated roads would equally contribute to reduce traffic congestion and in-bus crowding. Document type: Book

Abstract

Railway transport generally has the advantage for large-volume, long-haul freight operations. Africa possesses significant railway assets. However, many rail lines are currently not operational because of the lack of maintenance. The paper recasts light on the impact of rail transportation on firm productivity, using micro data collected in Tanzania. To avoid the endogeneity problem, the instrumental variable technique is used to estimate the impact of rail transport. The paper shows that the overall impact of rail use on firm costs is significant despite that the rail unit rates are set lower when the shipping distance is longer. Rail transport is a cost-effective option for firms. However, the study finds that firms' inventory is costly. This is a disadvantage of using rail transport. Rail operations are unreliable, adding more inventory costs to firms. The implied elasticity of demand for transport services is estimated at -1.01 to -0.52, relatively high in absolute terms. This indicates the rail users' sensitivity to prices as well as severity of modal competition against truck transportation. The study also finds that firm location matters to the decision to use rail services. Proximity to rail infrastructure is important for firms to take advantage of rail benefits. Document type: Book

Abstract

This paper presents the details of three scenarios -- leapfrog, lock-in, and lopsided -- that describe an illustrative set of technological states. Based largely on expert interviews, the paper argues that the technology outcomes are heavily attributable to the actions (or in some cases, inaction) of policy makers and incumbents. For each scenario, the paper presents descriptive levels of technology achievement and market outcomes for the energy, transport, and water sectors. One of the central differentiating features of the three scenarios is the extent to which governments perform their roles as enabling, that is, whether the policies are designed to help or hinder innovations that improve service levels, and distributive, that is, whether the policies are designed to ensure that multiple segments of society reap the rewards of innovation. A question raised as part of that theme is how countries can avoid lock-in, or how they might become derailed into a lopsided scenario. Some institutional behavioral markers of the scenarios were identified in these discussions and are noted in the paper. It is important to recognize that multiple combinations of these behaviors can lead to a lock-in or lopsided scenario. In addition to describing the scenarios in detail, the paper discusses the rationale for their creation, along with a brief discussion on the nature of uncertainty. The paper also describes the methodology employed in the creation of the scenarios, including expert interview methods and a day-long workshop. Document type: Book