Measuring pesticide overuse and its determinants: Evidence from Vietnamese rice and fruit farms

Pesticides have long been important for the development of agricultural production. However, improper use of pesticides may result in inefficiency with respect to farm profitability, in addition to external effects of pesticide use on environmental and human health. This paper employs a production function that explicitly accounts for the role of damage abatement inputs (i.e. pesticides) in the production process, to examine the optimal use of pesticides. It then investigates determinants of pesticide overuse versus underuse and the intensity of overuse. The empirical application uses data on Vietnamese rice and fruit farms drawn from the 2016 Vietnamese Household Living Standards Survey. Results show about 95% of farmers overused pesticides for both rice and fruit farming systems. The Mekong Delta, also known as the ‘Rice Bowl’ of Vietnam, has higher levels of overuse on rice farms than two other regions. Overuse intensity is lower for female and poorer rice farmers while intensity is higher for those with more income and more family members. For fruit farms, younger farmers or those with more family members were more likely to overuse versus underuse pesticides.     

Social media and price discovery: The case of cross-listed firms

In this article, we examine whether social media information affects the price-discovery process for cross-listed companies. Using over 29 million overnight tweets mentioning cross-listed companies, we examine the role of social media for a link between the last periods of trading in the US markets and the first periods in the UK market. Our estimates suggest that the size and content of information flows on social networks support the price-discovery process. The interactions between lagged US stock features and overnight tweets significantly affect stock returns and volatility of cross-listed stocks when the UK market opens. These effects weaken and disappear 1 to 3 hr after the opening of the UK market. We also develop a profitable trading strategy based on overnight social media, and the profits remain economically significant after considering transaction costs.     

The role of learning motivation on financial knowledge among Vietnamese college students

Using survey data from 730 undergraduates in Vietnam, we find that learning motivation and its components, especially self-efficacy, finance learning value, and achievement goals, significantly correlate with students' financial literacy performance. In addition, these correlations are moderated by student characteristics, among which academic seniority, university type, parents' education, and extra math study during high school matter the most. Our results raise significant implications to policymakers, researchers, and educators that include understanding the role of motivation and incorporating it in financial literacy education and intervention programs and considering the moderation roles that individuals' characteristics play in the motivation-financial literacy link. We encourage more research in these areas.     

International Environmental Agreement and Trade in Environmental Goods: The Case of Kyoto Protocol

Environmental and Resource Economics - The Kyoto Protocol has received much criticism for its effectiveness as well as the spillover effect (i.e. carbon leakage and competitiveness loss). This...     

Fostering creative minds: what predicts and boosts design competence in the classroom?

International Journal of Technology and Design Education - Can originality in real-world creative design thinking be improved through instruction and practice? Do such frequently-used...     

The returns to education and wage penalty from overeducation: New evidence from Vietnam

This study intends to estimate the rate of returns to education in Vietnam, the distributive effects of education on wages, and the wage penalty from the incidence of overeducation in the Vietnamese labor market during 2004–2016. This study employs a pseudo-panel approach to address omitted variables bias and the unconditional quantile regression to identify the heterogeneity of returns to education across the income distribution. Our main finding indicates that the estimated rate of returns to education in Vietnam is approximately 6.5%, showing a downward bias from previous estimates. The returns vary across wage distributions, where a lower rate of return is observed in lower quantiles and a higher rate among those individuals at the higher quantiles. The returns to education have declined since 2008, confirming the oversupply of highly educated workers in the Vietnamese labor market with an estimated wage penalty of 17%. Government assistance measures are needed to reduce the overeducation and the wage penalty issues in the Vietnamese labor market.