Poverty effects of food price escalation: The importance of substitution effects in Mexican households

Recent food price increases reportedly caused significant numbers of households to fall into poverty, particularly in the developing world. Most research into the welfare effects of these food price changes assumes constant demand or approximates second order substitution effects. Poverty forecasts with these assumptions may overestimate or underestimate the effect of food price increases in a nation where most households consume diverse food baskets. We account for full substitution by calculating a theoretically consistent food demand system, accounting for household responses to food price changes by decreasing some food purchases and increasing other food purchases. We use Mexican data to confirm the mitigation of adverse welfare effects from food price increases after accounting for country-specific dietary preferences in modeling demand. In comparison to previous literature, our welfare measures predict theoretically consistent numbers of Mexican households entering poverty due to recent food price changes.     

On the Opportunity Cost of Crop Diversification

Distance functions are increasingly being augmented, with environmental goods treated as conventional outputs. A common approach to evaluate the opportunity cost of providing an environmental good is the exploitation of the distance function's dual relationship to the value function. This implies that the opportunity cost is assumed to be non‐negative. This approach also requires a convex technology set. Focusing on crop diversification for a balanced sample of 44 cereal farms in the East of England for the years 2007–2013, this paper develops a novel opportunity cost measure that does not depend on these strong assumptions. We find that the opportunity cost of crop diversification is negative for most farms.     

Determinants of process innovation introductions: Evidence from 115 developing countries

This paper examines determinants of process innovation introductions across 115 (mostly) developing countries. Empirical research on process innovations lags behind product innovations. Accounting for firm characteristics, R&D, regulations and taxes, and corruption, results show that sole proprietors and R&D‐performing firms were more likely to introduce innovations, whereas greater prosperity made them less likely to do so. Corruption had a greasing effect, whereas firms in island nations were less likely to introduce, ceteris paribus. Effects of regulations and taxes and other firm characteristics were largely insignificant. Finally, some differences existed across manufacturing and service industries and across prevalence of innovation introductions.     

Drivers of COVID-19 vaccinations: vaccine delivery and delivery efficiency in the United States

NETNOMICS: Economic Research and Electronic Networking - This paper adds some formal research to the success of ongoing efforts to combat the COVID-19 pandemic by examining the drivers of the...     

Rejoinder to Paul Krugman

We provide a brief rejoinder to Krugman [2008, Response to Nelson and Schwartz. Journal of Monetary Economics 55, this issue] on three issues that are central to his original New York Review of Books article and his reply to our setting the record straight: (i) criticisms of Friedman; (ii) criticisms of monetarism; and (iii) interpretations of history.     

Understanding spot and forward exchange rate regressions

Using the Kalman filter, we obtain maximum likelihood estimates of a permanent–transitory components model for log spot and forward dollar prices of the pound, the franc, and the yen. This simple parametric model is useful in understanding why the forward rate may be an unbiased predictor of the future spot rate even though an increase in the forward premium predicts a dollar appreciation. Our estimates of the expected excess return on short-term dollar-denominated assets are persistent and reasonable in magnitude. They also exhibit sign fluctuations and negative covariance with the estimated expected depreciation. © 1997 John Wiley & Sons, Ltd.     

Developing Persuasion Knowledge by Teaching Advertising Literacy in Primary School

As part of a larger project to integrate advertising literacy into school curriculum, this research evaluates the effectiveness of an initial three-hour advertising literacy classroom intervention among eight- and nine-year-olds. The field experiment (a pretest/posttest, control/experimental group design) was implemented in 10 third grade classes in a three-week time period in three high-poverty schools in the United States. Low advertising literacy occurred at baseline. Evaluation results indicated significant increases in intervention students' understanding of the message creator, the selling intent, persuasive strategy, and target audience. Recommendations for curriculum development, refinement, and implementation for a wider audience are discussed.