Soil and cropping system research in semi-arid West Africa as related to the potential for conservation agriculture

Semi-arid West Africa faces challenges to increase sorghum and pearl millet production to meet food needs for a growing human population while increasing soil carbon (C), nutrient levels, and water holding capacity that are documented benefits of conservation agriculture. This review focuses on the wealth of research on cropping systems, tillage, crop residue, nutrient, and weed management as related to conservation agriculture. It also identifies needs for multidisciplinary, integrative research to assist the transition from current production systems to conservation agriculture. Crop residue use as livestock feed, or fuel are major constraints to adoption of conservation agriculture, which could be reduced by wood production in agroforestry systems, alternate energy sources, and increased forage supply. Crop residue and grain yields are related, thus improved crop, soil, water, nutrient, and weed management to increase grain yield would also increase the supply of crop residue with potential for ‘left over’ crop residue being available for soil mulching. Incorporating indigenous shrubs and/or cover crops could also increase crop residue supply. Species diversity can be increased through crop rotation, agroforestry, cover crops, and intercrops. Higher grain and stover yields and increased profit potential for resource-poor farmers in West Africa will be required before wide-scale adoption of conservation agriculture will be possible.     

Contestability and two-part pricing

This paper contributes to the debate over the relevance of contestability by demonstrating that the welfare properties claimed by proponents depend on the inability of incumbent firms to divide the market. Given the ability to divide the market using two-part prices, the incumbent can protect profitability. This possibility further illustrates the extremity of the assumptions upon which contestability rests as two-part pricing is commonly observed in some of the very markets that might be suggested to be more nearly contestable.The authors thank Barnali Gupta, William G. Shepherd and two reviewers for suggestions on earlier drafts.     

How Much of the Gender Difference in Child School Enrolment Can Be Explained? Evidence from Rural India

There are significant gender differences in child schooling in the Indian states though very few studies explain this gender difference. Unlike most existing studies we take account of the implicit and explicit opportunity costs of schooling and use a bivariate probit model to jointly determine a child's participation in school and market jobs. Results obtained from the World Institute of Development Economics Research (WIDER) villages in West Bengal suggest that indicators of household resources, parental preferences, returns to and opportunity costs of domestic work significantly affect child school enrolment. While household resources have similar effects on enrolment of boys and girls, other arguments tend to explain a part of the observed gender difference. Even after taking account of all possible arguments, there remains a large variation in gender differences in child schooling that cannot be explained by differences in male and female characteristics in our sample.     

Econophysics review: I. Empirical facts

This article and the companion paper aim at reviewing recent empirical and theoretical developments usually grouped under the term Econophysics. Since the name was coined in 1995 by merging the words ‘Economics’ and ‘Physics’, this new interdisciplinary field has grown in various directions: theoretical macroeconomics (wealth distribution), microstructure of financial markets (order book modeling), econometrics of financial bubbles and crashes, etc. We discuss the interactions between Physics, Mathematics, Economics and Finance that led to the emergence of Econophysics. We then present empirical studies revealing the statistical properties of financial time series. We begin the presentation with the widely acknowledged ‘stylized facts’, which describe the returns of financial assets—fat tails, volatility clustering, autocorrelation, etc.—and recall that some of these properties are directly linked to the way ‘time’ is taken into account. We continue with the statistical properties observed on order books in financial markets. For the sake of illustrating this review, (nearly) all the stated facts are reproduced using our own high-frequency financial database. Finally, contributions to the study of correlations of assets such as random matrix theory and graph theory are presented. The companion paper will review models in Econophysics from the point of view of agent-based modeling.     

An Empirical Analysis Of Industrial Disputes: Evidence From Indian States

This paper investigates the determinants of industrial disputes using data for fourteen major states of India over fifteen years from 1981 to 1996. We document that other than purely economic factors (e.g. wages, provident fund and other benefits, and factory size); socio-economic, institutional, and political factors have significant impact on industrial disputes. This supports the political economic view of the trade union behavior. We also provide the evidence that liberalization of Indian economy has enhanced industrial peace. Region specific factors as well as the ideology and characteristics of political parties in power of the state governments influence industrial disputes. Fixed capital per employee and overall growth rate of per capita state domestic products has negligible impact on industrial disputes.

     

Ethical evaluations, intentions, and orientations of accountants: Evidence from a cross-cultural examination

Society has high expectations concerning accounting professionals. More than ever, accountants need professional values and ethics that allow them to operate successfully and with integrity in a changing world. This study is a first attempt to understand the ethical evaluations, intentions, and orientations of accounting professionals and students from Latin American countries. Another objective is to validate the multidimensional ethics scale used by Cohen et al. [1998] in an international setting. The results did not validate such a scale but offer interesting findings about the Latin American sample. In such a context, ethics appear to be a collective concern guided by a different concept of equity. The results indicate that the respondents consider justice a superior value over what is considered correct, acceptable, or good.     

Household sectoral choice and effective demand for rural credit in India

An analysis of the ICRISAT data from three Indian villages raises concern about the extent of rationing mechanism inhibiting the spread of formal credit in rural India where a significant proportion of households do not have any outstanding loan or borrow from the informal sector only. A limited-dependent econometric analysis of the factors jointly determining household sectoral choice and effective demand for informal loan conditional on whether a formal loan is available suggests that compared to formal loan easy and adequate access and prompt recovery are significant determinants of the popularity and viability of informal rural credit among sample households; also some households substitute labour income to ease the extent of credit. Thus, rationing of the formal credit is not the only factor inhibiting the spread of formal credit in the study villages.     

The Money Trail: Ranking Donor Transparency in Foreign Aid

Transparency of aid activity is being recognized to be one of the key areas whereby aid effectiveness can be improved. In this paper, we propose an index to measure and rank donors on the transparency of their aid activities. The Transparency Index rates 31 bilateral and multilateral donor agencies on six measures of transparency. We find that being a member of the IATI is a powerful signal of a donor being more transparent across most other dimensions as well. We find no relationship between transparency and donor aid volumes. Overall IDA and Australia are identified as the most transparent donors, while Korea and IDB Special Fund are the least transparent.     

Environmental standards as strategic outcomes: A simple model

This paper analyses the strategic nature of choice of environmental standards considering both local and global pollution under alternative regimes of international trade. It also compares and contrasts the strategic equilibrium environmental standards and levels of pollution, local and global, with the world optimum levels. It shows that, in case of open economies, environmental standards can be either strategic substitutes or strategic complements. On the contrary, in case of closed economies, environmental standards are always strategic substitutes. It also shows that the strategic equilibrium environmental standards in case of open economies are higher than the world optimum in certain situations. Whereas, in absence of international trade, countries set, in equilibrium, lower environmental standards than the world optimum.     

Externalities, potential, value and consistency

We provide new characterization results for the value of games in partition function form. In particular, we use the potential of a game to define the value. We also provide a characterization of the class of values which satisfies one form of reduced game consistency.