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A Measure to Compare Matchings in Marriage Markets AgEcon
Biermann, Florian M..
In matching markets the number of blocking pairs is often used as a criterion to compare matchings. We argue that this criterion is lacking an economic interpretation: In many circumstances it will neither reflect the expected extent of partner changes, nor will it capture the satisfaction of the players with the matching. As an alternative, we set up two principles which single out a particularly “disruptive” subcollection of blocking pairs. We propose to take the cardinality of that subset as a measure to compare matchings. This cardinality has an economic interpretation: the subset is a justified objection against the given matching according to a bargaining set characterization of the set of stable matchings. We prove multiple properties relevant for a...
Tipo: Working or Discussion Paper Palavras-chave: Stable Marriage Problem; Matching; Blocking Pair; Instability; Matching Comparison; Decentralized Market; Bargaining Set; Environmental Economics and Policy; C0.
Ano: 2011 URL: http://purl.umn.edu/108250
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Analysis of matched cohort data AgEcon
Cummings, Peter; McKnight, Barbara.
Matching is occasionally used in cohort studies; examples include studies of twins and some studies of traffic crashes. Analysis of matched cohort data is not discussed in many textbooks or articles and is not mentioned in the Stata manuals. Risk ratios can be estimated using matched-pair cohort data with Stata’s mcc command. We describe a new command, csmatch, which can produce these risk ratios and is often more convenient. We briefly review flexible regression methods that can estimate risk ratios in matched cohort data: conditional Poisson regression and some versions of Cox regression.
Tipo: Journal Article Palavras-chave: Csmatch; Cohort study; Conditional Poisson regression; Matching; Matched-pair; Matched cohort study; Risk ratio; Odds ratio; Research Methods/ Statistical Methods.
Ano: 2004 URL: http://purl.umn.edu/116248
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Are Consumers Willing to Pay for Organic When the Food is Already Local? AgEcon
Connolly, Cristina; Klaiber, H. Allen.
The emergence of community supported agriculture (CSA) farms has provided a new way for small farms to remain competitive while engaging their local community through direct marketing. In this study, we report on some of the first revealed preference valuation of CSA attributes, including the willingness to pay for competing organic certification programs. Using data on the prices and attributes of 188 CSA farms spanning Ohio and Pennsylvania we estimate willingness to pay measures from both hedonic and nearest-neighbor matching methods. Results from a semi-log hedonic reveal a willingness to pay of approximately 9% for organic branding compared to natural, which translates into an additional $48 per summer season share. We also find a statistically...
Tipo: Working Paper Palavras-chave: Organic; Local; Matching; Hedonic; Community supported agriculture; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety; Q13; Q51.
Ano: 2012 URL: http://purl.umn.edu/124364
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Causal inference with observational data AgEcon
Nichols, Austin.
Problems with inferring causal relationships from nonexperimental data are briefly reviewed, and four broad classes of methods designed to allow estimation of and inference about causal parameters are described: panel regression, matching or reweighting, instrumental variables, and regression discontinuity. Practical examples are offered, and discussion focuses on checking required assumptions to the extent possible.
Tipo: Article Palavras-chave: Xtreg; Psmatch2; Nnmatch; Ivreg; Ivreg2; Ivregress; Rd; Lpoly; Xtoverid; Ranktest; Causal inference; Match; Matching; Reweighting; Propensity score; Panel; Instrumental variables; Excluded instrument; Weak identification; Regression; Discontinuity; Local polynomial; Research Methods/ Statistical Methods.
Ano: 2007 URL: http://purl.umn.edu/119292
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Constrained School Choice: An Experimental Study AgEcon
Calsamiglia, Caterina; Haeringer, Guillaume; Klijn, Flip.
The literature on school choice assumes that families can submit a preference list over all the schools they want to be assigned to. However, in many real-life instances families are only allowed to submit a list containing a limited number of schools. Subjects' incentives are drastically affected, as more individuals manipulate their preferentes. Including a safety school in the constrained list explains most manipulations. Competitiveness across schools plays an important role. Constraining choices increases segregation and affects the stability and efficiency of the final allocation. Remarkably, the constraint reduces significantly the proportion of subjects playing a dominated strategy.
Tipo: Working or Discussion Paper Palavras-chave: School Choice; Matching; Experiment; Gale-Shapley; Top Trading Cycles; Boston Mechanism; Efficiency; Stability; Truncation; Truthtelling; Safety School; Institutional and Behavioral Economics; C72; C78; D78; I20.
Ano: 2009 URL: http://purl.umn.edu/50480
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Erratum and discussion of propensity–score reweighting AgEcon
Nichols, Austin.
Tipo: Article Palavras-chave: Xtreg; Psmatch2; Nnmatch; Ivreg; Ivreg2; Ivregress; Rd; Lpoly; Xtoverid; Ranktest; Causal inference; Match; Matching; Reweighting; Propensity score; Panel; Instrumental variables; Excluded instrument; Weak identification; Regression; Discontinuity; Local polynomial; Research Methods/ Statistical Methods.
Ano: 2008 URL: http://purl.umn.edu/122619
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Estimation of average treatment effects based on propensity scores AgEcon
Becker, Sascha O.; Ichino, Andrea.
In this paper, we give a short overview of some propensity score matching estimators suggested in the evaluation literature, and we provide a set of Stata programs, which we illustrate using the National Supported Work (NSW) demonstration widely known in labor economics.
Tipo: Journal Article Palavras-chave: Propensity score; Matching; Average treatment effect; Evaluation; Research Methods/ Statistical Methods.
Ano: 2002 URL: http://purl.umn.edu/116022
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Feasibility Constraints and Protective Behavior in Efficient Kidney Exchange AgEcon
Nicolo, Antonio; Rodriguez Alvarez, Carmelo.
We propose a model of Kidney-Exchange that incorporates the main European institutional features. We assume that patients do not consider all compatible kidneys homogeneous and patients are endowed with reservation values over the minimal quality of the kidney they may receive. Under feasibility constraints, patients' truthful revelation of reservation values is incompatible with constrained efficiency. In the light of this result, we introduce an alternative behavioral assumption on patients' incentives. Patients choose their revelation strategies as to “protect” themselves from bad outcomes and use a lexicographic refinement of maximin strategies. In this environment, if exchanges are pairwise, then priority rules or rules that maximize a fixed ordering...
Tipo: Working or Discussion Paper Palavras-chave: Kidney; Matching; Protective Behavior; Institutional and Behavioral Economics; C78; D78.
Ano: 2009 URL: http://purl.umn.edu/50671
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Harmful Signaling in Matching Markets AgEcon
Kushnir, Alexey.
Some labor markets have recently developed formal signalling mechanisms, e.g. the signalling for interviews in the job market for new Ph.D. economists. We evaluate the effect of such mechanisms on two-sided matching markets by considering a game of incomplete information between firms and workers. Workers have almost aligned preferences over firms: each worker has “typical” commonly known preferences with probability close to one and “atypical” idiosyncratic preferences with the complementary probability close to zero. Firms have some commonly known preferences over workers. We show that the introduction of a signalling mechanism is harmful for this environment. Though signals transmit previously unavailable information, they also facilitate information...
Tipo: Working or Discussion Paper Palavras-chave: Signaling; Cheaptalk; Matching; Environmental Economics and Policy; C72; C78; D80; J44.
Ano: 2010 URL: http://purl.umn.edu/96837
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Implementing matching estimators for average treatment effects in Stata AgEcon
Abadie, Alberto; Drukker, David M.; Herr, Jane Leber; Imbens, Guido W..
This paper presents an implementation of matching estimators for average treatment effects in Stata. The nnmatch command allows you to estimate the average effect for all units or only for the treated or control units; to choose the number of matches; to specify the distance metric; to select a bias adjustment; and to use heteroskedastic-robust variance estimators.
Tipo: Journal Article Palavras-chave: Nnmatch; Average treatment effects; Matching; Exogeneity; Unconfoundedness; Ignorability; Research Methods/ Statistical Methods.
Ano: 2004 URL: http://purl.umn.edu/116250
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Input Price Risk and the Adoption of Conservation Technology AgEcon
Schoengold, Karina; Sunding, David L..
Replaced with revised version of poster 07/12/11.
Tipo: Conference Paper or Presentation Palavras-chave: Price risk; Technology adoption; Matching; Propensity score; Environmental Economics and Policy; Resource /Energy Economics and Policy; Risk and Uncertainty; Q1; Q5.
Ano: 2011 URL: http://purl.umn.edu/103857
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Insecurity of Property Rights and Matching in the Tenancy Market AgEcon
Macours, Karen.
This paper analyzes the functioning of land rental markets in the Dominican Republic using a new data set collected specifically to characterize the entire market. We analyze the choice of the landlords and the tenants in the search for the optimal partner. We show how insecure property rights leads to segmentation in the tenancy markets along socio-economic group and hence severely limits access to land for the rural poor.
Tipo: Conference Paper or Presentation Palavras-chave: Insecurity of property rights; Land markets; Matching; Risk and Uncertainty.
Ano: 2002 URL: http://purl.umn.edu/24931
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L’IMPACT DU CAPITAL HUMAIN SUR LA PRODUCTIVITE AGRICOLE AU BURKINA FASO AgEcon
Theophile, Kabore.
Contributed Paper presented at the International Conference on Agriculture Of Ouagadougou (BURKINA FASO), December 4-6, 2010.
Tipo: Conference Paper or Presentation Palavras-chave: Capital humain; Rendements; Productivité; Parcelle; Matching; Human capital; Productivity; Farm; Matching; Labor and Human Capital; Productivity Analysis; E24; N54; Q12.
Ano: 2010 URL: http://purl.umn.edu/102275
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Long-Term Unemployment and Subsidizing Vacancies in a Growth-Matching Model AgEcon
Birk, Angela.
How can long-term unemployment be reduced by policy measures of the government? In this paper a growth-matching-model is developed, in which the unemployment pool consists of heterogeneous unemployed workers, short-term and long-term unemployed, and with an endogenous skill-depreciation of the long-term unemployed emerging as technical progress accelerates. For innovation countries characterized by rapid technical progress we show that through subsidizing vacancy creation which causes a substitution and an income effect long-term unemployment can be reduced. Since the positive substitution effect implied by subsidizing vacancy creation outweighs the negative income effect induced by taxing the household's income, a positive employment effect results...
Tipo: Working or Discussion Paper Palavras-chave: Long-term unemployment; Growth; Search; Matching; Subsidies; Labor and Human Capital; E24; J41; O41.
Ano: 2001 URL: http://purl.umn.edu/26194
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Nonfarm Employment and Poverty Reduction in Rural Ghana: A Propensity-Score Matching Analysis AgEcon
Owusu, Victor; Abdulai, Awudu.
This article investigates the impact of nonfarm employment on farm household income and way out of poverty, using farm household data from Brong-Ahafo region of Ghana. A propensity score matching model is used to evaluate the impact participating in both wage and self-employment. Separate estimates are also provided for males and females. The results from the study show that nonfarm employment has a positive and robust effect on farm household income and a negative and significant effect on the likelihood of being poor. Self-employment was found to have much higher impacts than wage employment, reflecting the fact that most employment opportunities in the rural areas are in the former sector.
Tipo: Conference Paper or Presentation Palavras-chave: Non-farm employment; Poverty; Matching; Community/Rural/Urban Development; Consumer/Household Economics; Food Security and Poverty; Research Methods/ Statistical Methods.
Ano: 2009 URL: http://purl.umn.edu/51363
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Qualification-Mismatch and Long-Term Unemployment in a Growth-Matching Model AgEcon
Birk, Angela.
How does technical progress affect long-term unemployment? The relationship between long-term unemployment and the rate of growth attributable to technical progress is evaluated in a growth-matching-model with heterogeneous jobless workers and with endogenously determined long-term unemployed resulting from skill-depreciation. For innovation economies characterized by high steady-state levels of capital intensities the model shows that, due to a capitalization effect and a qualification-mismatch effect, increasing technological progress has adverse implications for long-term unemployment. Furthermore, for imitation economies with low steady-state capital intensities increasing technological progress can be either favorable or less favorable for long-term...
Tipo: Working or Discussion Paper Palavras-chave: Long-term unemployment; Mismatch; Growth; Search; Matching; Labor and Human Capital; E24; J41; O41.
Ano: 2001 URL: http://purl.umn.edu/26181
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Sensitivity analysis for average treatment effects AgEcon
Becker, Sascha O.; Caliendo, Marco.
Based on the conditional independence or unconfoundedness assumption, matching has become a popular approach to estimate average treatment effects. Checking the sensitivity of the estimated results with respect to deviations from this identifying assumption has become an increasingly important topic in the applied evaluation literature. If there are unobserved variables that affect assignment into treatment and the outcome variable simultaneously, a hidden bias might arise to which matching estimators are not robust. We address this problem with the bounding approach proposed by Rosenbaum (Observational Studies, 2nd ed., New York: Springer), where mhbounds lets the researcher determine how strongly an unmeasured variable must influence the selection...
Tipo: Article Palavras-chave: Mhbounds; Matching; Treatment effects; Sensitivity analysis; Unobserved heterogeneity; Rosenbaum bounds; Research Methods/ Statistical Methods.
Ano: 2007 URL: http://purl.umn.edu/119255
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Simulation-based sensitivity analysis for matching estimators AgEcon
Nannicini, Tommaso.
This article presents a Stata program (sensatt) that implements the sensitivity analysis for matching estimators proposed by Ichino, Mealli, and Nannicini (Journal of Applied Econometrics, forthcoming). The analysis simulates a potential confounder to assess the robustness of the estimated treatment effects with respect to deviations from the conditional independence assumption. The program uses the commands for propensity-score matching (att* ) developed by Becker and Ichino (Stata Journal 2: 358–377). I give an example by using the National Supported Work demonstration, widely known in the program evaluation literature.
Tipo: Article Palavras-chave: Sensatt; Sensitivity analysis; Matching; Propensity score; Program evaluation; Research Methods/ Statistical Methods.
Ano: 2007 URL: http://purl.umn.edu/119280
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THE VALUE OF WATER AS AN URBAN CLUB GOOD: A MATCHING APPROACH TO HOA-PROVIDED LAKES AgEcon
Abbott, Joshua K.; Klaiber, H. Allen.
Urban lakes located in arid environments require large quantities of water to maintain their water levels, with much of this water associated with high opportunity costs. Many of these lakes are manmade and provide various amenities to surrounding residents. In this paper we use matching techniques to recover the average capitalized value of lakes to surrounding communities and differentiate between community members and adjacent households to recover heterogeneous treatment effects. Importantly, we consider the role of both unobservable and observable features of matching to recover heterogeneous capitalization across lake communities. Our results suggest that the capitalized value of lakes to community residents is highly heterogeneous and ranges from an...
Tipo: Conference Paper or Presentation Palavras-chave: Matching; Treatment effects; Urban lakes; Capitalization; Environmental Economics and Policy; Political Economy; Resource /Energy Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/103781
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