Do African Manufacturing Firms Learn from Exporting?

We use firm-level panel data for the manufacturing sector in four African countries to investigate whether exporting impacts on efficiency, and whether efficient firms self-select into the export market. Based on simultaneous estimation of a production function and an export regression, our preferred results indicate significant efficiency gains from exporting, which can be interpreted as learning by exporting. We show that modelling unobserved heterogeneity by a flexible approach is important for deriving this conclusion. A policy implication of our results is that Africa would gain from orientating its manufacturing sector towards exporting.     

When Do Numbers Count? The Differential Impact of the PISA Rating and Ranking on Education Policy in Germany and the US

Why do international comparisons have an impact on some countries while other countries do not respond? This article examines the power of international ratings and rankings (R&R) using the OECD's PISA study and its differential impact on education policymaking as a case study. It argues that international R&R have an impact when two conditions are simultaneously fulfilled: the evaluated topic is framed as crucial in the national discourse, and a substantial gap between national self-perception and the empirical results can be observed. After assessing the media impact of PISA on 21 OECD countries, the theoretical argument is illustrated by an evaluation of the differing reactions of two similarly poorly performing countries: Germany and the US. While the German system of secondary education was strongly affected by the international comparison, beginning with the first PISA study in 2000, and underwent comprehensive changes, the US first responded noticeably in the public and the political discourse only in 2010 to its below-average ranking.     

How Does Information About Elite Tax Evasion Affect Political Participation: Experimental Evidence from Tanzania

We present results of a randomised field experiment where voters in Tanzania were given information about elite use of tax havens. Information provided in a neutral form had no effect, while information phrased in more morally charged terms led to a reduction in voting intentions. Rather than increase the perceived importance of voting, charged information tends to undermine confidence in political institutions and the social contract. The effects are particularly pronounced among the less well off, indicating that increased transparency in the absence of perceived agency may not improve political participation.     

Tax Innovations and Public Revenues in Sub-Saharan Africa

Abstract

We study the effect of two tax innovations – value added taxes (VAT) and autonomous revenue authorities (ARA) – on tax revenues in sub-Saharan Africa. The dataset consists of 47 countries over 1980–2010. We find that VATs have no effect on total tax revenues, neither in the short- nor in the long-run. ARAs lead to higher tax revenues in the short- and medium-run, but the effect dissipates over time. The main conclusion is that tax innovations are not a panacea to overcome the revenue shortages in African countries, but they are helpful in the short- and medium-run.     

A fast preparation of skeletal materials using enzyme maceration

The current study investigates the removal of soft tissues from mice and rats by the use of three different proteases and one lipase from Novozymes A/S. The results demonstrate the enzyme maceration to be remarkably fast (1-3 h) compared to the traditional warm-water procedure, which requires up to several days. In addition, the enzyme maceration eliminates the odor problem associated with the traditional procedure. It is shown that stirring of the enzyme maceration bath is the main factor which determines the speed of the maceration. For mice, the time required for enzyme maceration can vary from 1 to 8 h depending on the stirring speed. The method investigated here allows preparation of skeletal material in an essentially odorless way within a matter of hours, making the method useful in particular for forensic science, private conservation workshops, and educational purposes.     

Reviews

Crisis Response: Humanitarian Band‐Aids in Sudan and Somalia by John Prendergast. London: Pluto Press, 1997. 180pp.

In the Shadow of Marriage: Gender and Justice in an African Community edited by Anne M.O. Griffiths. The University of Chicago Press, Chicago and London, 1997. ix plus 310pp including notes, references and index.

From Reserve to Region: Apartheid and Social Change in the Keiskammahoek District of (former) Ciskei, 1950–1990 edited by Chris de Wet and Michael Whisson. Institute of Social and Economic Research, Rhodes University, Grahamstown, 1997. xiv plus 343pp. including tables, figures, appendices, maps. Paperback.

Japan and Africa: Big Business and Diplomacy by Jun Morikawa. First published (in Southern Africa) by Witwatersrand University Press, Johannesburg, 1997. xii plus 298 pp. including contents, figures, a list of Japanese terms and abbreviations, photographs, appendices, select bibliographies and an index. Paperback.

Conflict and its Resolution in Contemporary Africa edited by Harry G. West. University Press of America, Lanham, 1997. xv plus 140pp.

A Different Kind of War Story by Carolyn Nordstrom. The University of Pennsylvania Press, Philadelphia, 1997. xviii plus 254pp. including illustrations, notes, bibliography and index. Paperback.     

Tariffs and Firm Performance in Ethiopia

We use data on Ethiopian manufacturing firms and commodity-level data on tariffs to examine the effects of trade liberalisation on firm performance. We distinguish the productivity gains that arise from reducing final goods tariffs from those that arise from reducing tariffs on intermediate inputs. We find no evidence that output tariff reduction improves productivity, but we find large positive effects of input tariff reductions. These are robust to alternative productivity measures, treating tariffs as endogenous, and various generalisations of the model. We conclude that policy measures designed to facilitate access to inputs produced abroad may lead to productivity gains.     

Does democracy reduce corruption?

While democracy is commonly believed to reduce corruption, there are obvious endogeneity problems in measuring the impact of democracy on corruption. This article attempts to address the endogeneity of democracy by exploiting the thesis that democracies seldom go to war against each other. We instrument for democracy using a dummy variable reflecting whether a country has been at war with a democracy in the period 1946–2008, while controlling for the extent to which countries have been at war in general. We find that democracy to a significant extent reduces corruption, and the effect is considerably larger than suggested by estimations not taking endogeneity into account. Democracy may hence be more important in combating corruption than previous studies would suggest.