Scott Rozelle

Bio: Scott Rozelle is an academic researcher from Stanford University. The author has contributed to research in topics: China & Rural area. The author has an hindex of 87, co-authored 789 publications receiving 30543 citations. Previous affiliations of Scott Rozelle include Catholic University of Leuven & University of California.

Epidemiology, causes, clinical manifestation and diagnosis, prevention and control of coronavirus disease (COVID-19) during the early outbreak period: a scoping review.

Abstract: The coronavirus disease (COVID-19) has been identified as the cause of an outbreak of respiratory illness in Wuhan, Hubei Province, China beginning in December 2019. As of 31 January 2020, this epidemic had spread to 19 countries with 11 791 confirmed cases, including 213 deaths. The World Health Organization has declared it a Public Health Emergency of International Concern. A scoping review was conducted following the methodological framework suggested by Arksey and O’Malley. In this scoping review, 65 research articles published before 31 January 2020 were analyzed and discussed to better understand the epidemiology, causes, clinical diagnosis, prevention and control of this virus. The research domains, dates of publication, journal language, authors’ affiliations, and methodological characteristics were included in the analysis. All the findings and statements in this review regarding the outbreak are based on published information as listed in the references. Most of the publications were written using the English language (89.2%). The largest proportion of published articles were related to causes (38.5%) and a majority (67.7%) were published by Chinese scholars. Research articles initially focused on causes, but over time there was an increase of the articles related to prevention and control. Studies thus far have shown that the virus’ origination is in connection to a seafood market in Wuhan, but specific animal associations have not been confirmed. Reported symptoms include fever, cough, fatigue, pneumonia, headache, diarrhea, hemoptysis, and dyspnea. Preventive measures such as masks, hand hygiene practices, avoidance of public contact, case detection, contact tracing, and quarantines have been discussed as ways to reduce transmission. To date, no specific antiviral treatment has proven effective; hence, infected people primarily rely on symptomatic treatment and supportive care. There has been a rapid surge in research in response to the outbreak of COVID-19. During this early period, published research primarily explored the epidemiology, causes, clinical manifestation and diagnosis, as well as prevention and control of the novel coronavirus. Although these studies are relevant to control the current public emergency, more high-quality research is needed to provide valid and reliable ways to manage this kind of public health emergency in both the short- and long-term.

Migration remittances and agricultural productivity in China.

Abstract: In our paper we have used the New Economics of Labor Migration framework to trace the complex linkages that exist among migration remittances and agricultural productivity [in China]. Constraints in the operation of on-farm labor and capital or insurance markets (or institutions) provide households with a motivation to migrate and distort on-farm operations when labor leaves. In our household sample the net impact of migration and remittances on maize production is negative. (EXCERPT)

Migration and Incomes in Source Communities: A New Economics of Migration Perspective from China

Abstract: The objective of this paper is to understand the effects of China’s migration on source communities and to discuss their policy implications. We draw from New Economics of Labor Migration (NELM) theory to understand how migration and migrant remittances can relax or tighten market constraints in China’s rural economy. Using simultaneous-equation econometric techniques and household survey data from China, we estimate net, sectorspecific effects of migration on rural household income, focusing on farm production and self-employment. Our econometric findings indicate that the loss of labor to migration has a negative effect on household cropping income in source areas. However, we provide evidence that remittances sent home by migrants positively compensate for this lost-labor effect, contributing to household incomes directly and indirectly by stimulating crop and possibly self-employment production. This finding offers evidence in support of the NELM hypothesis that remittances loosen constraints on production in the imperfect-market environments characterizing rural areas in less developed countries. Taking into account both the multiple effects of migration and the change in household size, participating in migration increases household per-capita income between 14 and 30 percent. Migration and Incomes in Source Communities: A New Economics of Migration Perspective from China China is experiencing the largest peacetime flow of labor out of agriculture ever witnessed in world history (Solinger, 1999; Rozelle et al., 1999). Despite the rapid expansion of labor migration, China’s work force is still disproportionately employed in agriculture compared to other countries at similar levels of per-capita GDP (Taylor and Martin, 2001). Hence, as China’s economy continues to expand, the flow of labor to urban areas will continue and even accelerate (Johnson, 1999). The massive flow of labor away from farms has intensified research interest in China’s migration in recent years. However, as in the broader literature on migration in less developed countries, most recent studies on China’s migration have focused on determining the size and composition of the labor flow, macroeconomic implications of increased migration, and the effects of migration on urban areas (Zhao, 1999; Yang, 1999; 1997). Less emphasis has been placed on researching the effects of migration on the rural communities that migrants leave, even though evidence shows that the rural household in the village of origin is typically the central concern of all those involved in migration– both those who leave and those who stay behind (exceptions include Wang and Zuo, 1999; Bai, 2001). Moreover, the recent increase in migration has left policy makers particularly concerned regarding the way source communities will be affected (MOA, 1999). They are concerned that as labor flows away from farms, food production and crop income will decline, potentially threatening China’s food security. Furthermore, policy makers are concerned about the increasing gap between urban and rural household incomes. If migration exacerbates this gap, some fear that as it grows rural residents eventually will flood cities ill-equipped to absorb them. Others fear that discontent over a rising urban-rural income gap could even spill over into political unrest (Yang, 1999). Because China’s markets and other modern economic institutions are still relatively undeveloped, migration may play a pivotal role in creating or overcoming constraints caused by the lack of well-functioning markets and/or institutions (Knight and Song, 1999; Benjamin and Brandt, 2000). The “new economics of labor migration” (NELM) literature analyzes migration as a household decision rather than as an individual decision (Stark, 1991). The NELM hypothesizes that rural households facing imperfect market environments decide

Hazards of Expropriation: Tenure Insecurity and Investment in Rural China

Abstract: This paper uses household data from Northeast China to examine the link between investment and land tenure insecurity induced by China’s system of village-level land reallocation. We quantify expropriation risk using a hazard analysis of individual plot tenures and incorporate the predicted “hazards of expropriation” into an empirical analysis of plot-level investment. Our focus is on organic fertilizer use, which has long lasting benefits for soil quality. Although we find that higher expropriation risk significantly reduces application of organic fertilizer, a welfare analysis shows that guaranteeing land tenure in this part of China would yield only minimal efficiency gains.

Five years of Bt cotton in China - the benefits continue.

Abstract: Bt cotton is spreading very rapidly in China, in response to demand from farmers for technology that will reduce both the cost of pesticide applications and exposure to pesticides, and will free up time for other tasks. Based on surveys of hundreds of farmers in the Yellow River cotton-growing region in northern China in 1999, 2000 and 2001, over 4 million smallholders have been able to increase yield per hectare, and reduce pesticide costs, time spent spraying dangerous pesticides, and illnesses due to pesticide poisoning. The expansion of this cost-saving technology is increasing the supply of cotton and pushing down the price, but prices are still sufficiently high for adopters of Bt cotton to make substantial gains in net income.

Estimation and Inference in Econometrics

Abstract: Offering a unifying theoretical perspective not readily available in any other text, this innovative guide to econometrics uses simple geometrical arguments to develop students' intuitive understanding of basic and advanced topics, emphasizing throughout the practical applications of modern theory and nonlinear techniques of estimation. One theme of the text is the use of artificial regressions for estimation, reference, and specification testing of nonlinear models, including diagnostic tests for parameter constancy, serial correlation, heteroscedasticity, and other types of mis-specification. Explaining how estimates can be obtained and tests can be carried out, the authors go beyond a mere algebraic description to one that can be easily translated into the commands of a standard econometric software package. Covering an unprecedented range of problems with a consistent emphasis on those that arise in applied work, this accessible and coherent guide to the most vital topics in econometrics today is indispensable for advanced students of econometrics and students of statistics interested in regression and related topics. It will also suit practising econometricians who want to update their skills. Flexibly designed to accommodate a variety of course levels, it offers both complete coverage of the basic material and separate chapters on areas of specialized interest.

Economic growth and income inequality

Abstract: We investigate whether income inequality affects subsequent growth in a cross-country sample for 1965-90, using the models of Barro (1997), Bleaney and Nishiyama (2002) and Sachs and Warner (1997), with negative results. We then investigate the evolution of income inequality over the same period and its correlation with growth. The dominating feature is inequality convergence across countries. This convergence has been significantly faster amongst developed countries. Growth does not appear to influence the evolution of inequality over time. Outline