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Identification and Estimation of Social Interaction-Based Models: A Changes-In-Changes Approach with an Application to Adolescent Substance Use AgEcon
Yang, Muzhe.
This paper outlines a method for detecting and assessing the strength of social interactions through a changes-in-changes design. The proposed approach is based on a linear-in-means model and aims to resolve the "reflection problem", unobserved heterogeneities and endogenous group formation that plague identification of social interactions. Using longitudinal data from Add Health with rarely collected information on peer group's composition, we explore an exogenous variation in peer's drug use induced by a "mover friend" that occurs between Add Health's survey periods. This quasi-experiment shares a similar nature of a policy intervention of removing drug-user friends from a peer group. Such treatment-control group differences together with changes over...
Tipo: Conference Paper or Presentation Palavras-chave: Social interactions; Linear-in-expectations; Linear-in-means; Difference-in-differences; Changes-in-changes; Demand and Price Analysis.
Ano: 2007 URL: http://purl.umn.edu/9800
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Measuring the Impact of the Environmental Quality Incentives Program (EQIP) on Irrigation Efficiency and Water Conservation AgEcon
Wallander, Steven; Hand, Michael S..
Since the passage of the 1996 Farm Act, the Environmental Quality Incentives Program (EQIP) has provided over $10 billion in technology adoption subsidies. One of the national conservation priorities in EQIP is water conservation, but it is not known how participation in EQIP by irrigators affects water application rates and decisions to expand or reduce a farm’s irrigated acreage. Using a farm-level panel data set drawn from three national samples of irrigators taken in 1998, 2003, and 2008, this study provides the first national scale econometric estimates of the changes in water application rates and irrigated acreage that result when a farm receives EQIP payments. Due to a five-fold increase in EQIP funding following the 2002 farm bill, the change in...
Tipo: Conference Paper or Presentation Palavras-chave: EQIP; Irrigation efficiency; Water conservation; Difference-in-differences; Matching estimator; Environmental Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/103269
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Does Limited Access at School Result in Compensation at Home? The Effect of Soft Drink Bans in Schools on Purchase Patterns Outside of Schools AgEcon
Huang, Rui; Kristin, Kiesel.
This paper investigates the effects of banning soft drinks in schools on purchases outside of school. We utilize unique household-level and store-level data sources in combination with time-series and cross-sectional variation of state-level regulations in a difference-in-differences (DD) approach. We detect a decrease in the overall trend in sales, but observe this downward trend in households with and without children, as well as in states with and without regulation. Controlling for advertising allows us to further reject that leading brands intensify their advertising efforts and target children to potentially offset their reduced presence at schools. Finally, we find no evidence of substitution effects among possible beverage product alternatives. Our...
Tipo: Conference Paper or Presentation Palavras-chave: Soft drink bans; Soft drink consumption; Scanner data; Schools; Regulation; Difference-in-differences; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; D12; D18; L51; C93.
Ano: 2010 URL: http://purl.umn.edu/116417
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Can Information Costs Affect Consumer Choice?—Nutritional Labels in a Supermarket Experiment— AgEcon
Kiesel, Kristin; Villas-Boas, Sofia Berto.
This paper investigates whether information costs under currently regulated nutritional labeling prevent consumers from making healthier food choices. We implement five nutritional shelf label treatments in a market-level experiment. These labels reduce information costs by highlighting and summarizing information available on the Nutritional Facts Panel. Following a difference-in-differences and synthetic control method approach, we analyze weekly store-level scanner data for microwave popcorn purchases from treatment and control stores. Our results suggest that consumer purchases are affected by information costs. Implemented low calorie and no trans fat labels increase sales. In contrast, implemented low fat labels decrease sales, suggesting that...
Tipo: Conference Paper or Presentation Palavras-chave: Nutritional labeling; Information cost; Scanner data; Market-level experiment; Difference-in-differences; Synthetic control method; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; C93; D01; D18; D83; L51.
Ano: 2010 URL: http://purl.umn.edu/116433
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Do Exports Raise Productivity? Plant-level Evidence from the Colombian Agri-food Industries AgEcon
Kandilov, Ivan T.; Liu, Xiangping.
Using detailed plant-level manufacturing Census data from the Colombian Agri-food industries, we show that exports raise plant-level productivity by about 15 to 20 percent. However, the estimates reveal that efficiency in plants that become persistent exporters, i.e. plants that service foreign markets at least 30 percent of the time during our sample years 1981-1991, increases about 30 percent upon their entry into foreign markets, while productivity in plants that become only occasional exporters does not change at all. Hence, the positive impact of exports on productivity for is driven by the large positive impact on persistent exporters. To identify the effect of exports on plant-level productivity we employ the Levinsohn-Petrin (2003) measure of...
Tipo: Working or Discussion Paper Palavras-chave: Exports; Productivity; Difference-in-differences; Propensity score matching; International Development; International Relations/Trade; Production Economics; Productivity Analysis; Q17; F12; Q12; O33.
Ano: 2011 URL: http://purl.umn.edu/103632
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Health Care Reform and Farm Women’s Off-Farm Labor Force Participation: Evidence from Taiwan AgEcon
Liao, Pei-An; Taylor, J. Edward.
Do non-wage fringe benefits affect women’s off-farm work decisions? We test the impact of the 1995 introduction of universal National Health Insurance (NHI) in Taiwan on off-farm labor force participation (LFP) among farm wives. Our results, based on a difference-in- differences approach, indicate that employment-delinked NHI reduced farm wives’ off-farm LFP by 9.6 to 13.6 percentage points. The larger impact was for wives from small farm households. The health insurance reform had a larger negative impact on overall LFP among married women in agricultural households than in nonagricultural households.
Tipo: Journal Article Palavras-chave: Agricultural households; Difference-in-differences; Farm wives; Health care; Insurance; Labor force participation; Off-farm; Taiwan; Health Economics and Policy; Labor and Human Capital.
Ano: 2010 URL: http://purl.umn.edu/93218
Registros recuperados: 6
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