Bayesian Unconditional Quantile Regression: An Analysis of Recent Expansions in Wage Structure and Earnings Inequality in the US 1992–2009

We develop Bayesian inference for an unconditional quantile regression model. Our approach provides better estimates in the upper tail of the wage distribution as well as valid small sample confidence intervals for the Oaxaca–Blinder decomposition. We analyze the recent changes in the US wage structure using data from the CPS Outgoing Rotation Group from 1992 to 2009. We find that the largest part of the recent changes is explained mainly by differences in returns to education while the decline in the unionization rate has a small impact, and that earnings inequality is rising more at the top end of the wage distribution.     

Determinants of property rights institutions: survey of literature and new evidence

Why do some countries have better institutions than others? More specifically, what accounts for variation in the quality of property rights institutions in different countries? In this paper, I empirically assess four different theories relating to the determinants of property rights institutions: (1) the economic approach, which maintains that property rights institutions are created when the benefits of their creation exceed their costs; (2) the cultural approach, which stipulates that institutional variation reflects the differences in the beliefs of political leaders about what institutions create benefits for society; (3) the historical approach, which contends that cross-country differences in property rights institutions are the by-product of historical accidents; and (4) the political approach, which defends the premise that institutions are voluntarily chosen by the individuals who control political power, and these individuals choose institutions with the objective to maximize their personal payoffs rather than the benefits of the society as a whole. In order to test the veracity of these theories, I undertake a cross-sectional analysis of 142 countries (including 116 developing and 26 developed countries) over the period 1970–2005. The results of this analysis provide several interesting insights. Firstly, they indicate that the political approach appears to be the most relevant explanation for cross-country variation in property rights institutions: not only is this approach the most statistically robust, it also provides the best fit with the property rights index. The results of non-nested hypothesis test à la Davidson and MacKinnon (1981) confirm this analysis. Secondly, regardless of econometric specification and country sample, democracy is positively and significantly linked to property rights institutions. Thirdly, the data also reveal that while legal origin does significantly affect property rights institutions in developing countries, it appears to have no effect in developed countries. Fourthly, my analysis demonstrates that, in contrast to the full sample case, an increase in GDP per capita does not significantly contribute to the improvement in the quality of property rights institutions in Africa.     

Have coffee producers benefited from the new domestic cherry market? Evidence using panel data from Rwanda

The article assesses the effects of the new domestic cherry market on coffee‐growing households in Rwanda using panel data. Findings from combined first differenced with instrumental variable specification and other estimation methods provide evidence that farmers who sell to the cherry market do not increase their expenditures compared to farmers selling to the traditional parchment market. The different time lags in terms of when farmers started selling to the new cherry market may explain the lack of statistically significant differences across the two groups. It is possible that farmers will adjust their expenditure patterns in subsequent periods after year‐over‐year market trends become more apparent to them.     

The impact of index‐insured loans on credit market participation and risk‐taking

Index‐insured loans offer considerable advantages over standalone insurance policies for improving farmers’ access to agricultural credit. However, research on demand for such products and their impact on profitable investment decisions has been limited and conflicting. In this article, we investigate the impact of index insurance on demand for credit and investment decisions using a lab‐in‐the‐field experiment conducted in rural Tanzania. We find that index insurance increases demand for credit and high‐risk high‐return investments.     

Gender and the dynamics of technology adoption: Empirical evidence from a household-level panel data

Very few empirical studies account for the dynamic nature of the agricultural technology adoption decision and none of these explores if this dynamic nature depends on the gender of the decision maker. Using four waves of a household-level Ugandan panel data, this is the first empirical analysis to account for self-learning (one's own adoption experience) in explaining current adoption decision in a developing country context, and the first to study the interaction between self-learning and gender. Technology adoption is defined as adoption of hybrid seed, inorganic fertilizer, or pesticides. Our results indicate that the dynamic panel data Probit model is superior to its static counterpart in the sense that self-learning, captured by lagged technology adoption indicators, is by far the most important determinant of technology adoption. We also find a weaker impact of self-learning for female-headed households than male-headed households. Female-headed households face fewer learning opportunities, which produce a lower self-learning impact in later periods, further exacerbating the gap in technology adoption among male- and female-headed households.     

Modeling regime‐dependent agricultural commodity price volatilities

In stark contrast to financial markets, relatively little attention has been given to modeling agricultural commodity price volatility. In recent years, numerous methodologies with various strengths have been proposed for modeling price volatility in financial markets. We propose using a mixture of normals with unique GARCH processes in each component for modeling agricultural commodity prices. While a normal mixture model is quite flexible and allows for time varying skewness and kurtosis, its biggest strength is that each component can be viewed as a different market regime and thus estimated parameters are more readily interpreted. We apply the proposed model to ten different agricultural commodity weekly cash prices. Both in‐sample fit and out‐of‐sample forecasting tests confirm that the two‐state NM‐GARCH approach performs better than the traditional normal GARCH model. A significant and state‐dependent inverse leverage effect is detected only for pork in the regime where the price is expected to drop, indicating the volatility in this regime tends to increase more following a realized price rise than a realized price drop.     

Does Foreign Direct Investment Promote Exports? Evidence from African Countries

This paper empirically examines the effect of foreign direct investment (FDI) inflows on exports in Africa. Using the system‐generalised method of moments estimator for linear dynamic panel data on a sample of 53 African countries and five‐year periods from 1970 to 2009, the paper finds that higher FDI inflows are positively and significantly linked with higher exports of goods and services. A large part of the FDI effect is driven by its spillover effects on exports. The paper also finds the lagged value of exports, a competitive currency, as well as increases in domestic investment and physical infrastructure, to be factors stimulating African exports.     

Rice demand in Tanzania: an empirical analysis

We investigate the consumer side of the Tanzania rice market with the primary objective of estimating price elasticities of imported and domestically produced rice. Previous studies of the rice market in Tanzania claim that domestic rice is implicitly protected by consumer preference of its perceived better quality. However, rice producers increasingly complain that imported rice adversely impacts the price of domestic rice. Using household consumer survey data, we estimate price and expenditure elasticities of imported rice, domestic rice, and maize to assess their substitutability in the Tanzanian diet. Our results show that Tanzanian consumers have a preference for domestic rice varieties with weak substitutability between domestic and imported rice varieties.     

Saying it without words: a qualitative study of employee voice in the Iranian building sector

Abstract

The primary aim of this study is to examine the nature, extent and workplace experiences of voice in an industry characterized by vulnerable workers with precarious term of employment. Using qualitative data on the practice of voice and participation among a sample of construction and building materials & products manufacturing firms, we found that the motivation of workers to fulfil their basic human needs take precedence over other needs such as voice and participation intention. The extent to which employee voice was embedded in the organizational policies was found to rely primarily upon the need for compliance with minimum labor legislation and ISO quality management factory regime. Our findings also suggest that voice and participation beyond regulatory and ISO quality compliance remain at the sole discretion of the management that advocated a carrot and stick orientation. The article concludes with the discussion of theoretical and practical implications of the findings and identification of a number of new avenues for future research.