Does education promote social capital? Evidence from IV analysis and nonparametric-bound analysis

This study uses the British National Child Development Study to examine the effect of educational attainment on social capital at the individual level. Social trust and membership of voluntary groups are considered as two basic indicators of social capital. We employ the IV analysis and nonparametric bound analysis to tackle the problem of education endogeneity. Both the approaches reveal that the OLS estimator of the educational effect suffers from an upward bias in the study of group membership. We do not observe any significant bias in the educational effect on social trust. Our empirical findings indicate that education has a positive influence in promoting social trust and membership of voluntary groups.     

A Learning Design for Reducing Hypothetical Bias in the Contingent Valuation Method

Over the last few years a great deal of research has focussed on hypothetical bias in value estimates obtained with the contingent valuation (CV) method and on means for ameliorating if not eliminating such bias. To date, efforts to eliminate hypothetical bias have relied on calibration techniques or on word-smithing of one kind or another to induce subjects to provide responses to hypothetical questions that mimic responses made by subjects facing actual payments in the valuation experiment. This paper introduces a different approach for eliminating hypothetical bias. A design for a CV survey format is presented which provides subjects with the opportunity to learn how the CV institution works. Sequential referenda are conducted where respondents gain experience in CV settings by participating in both hypothetical and real referenda. The logic of this Learning Design is a straightforward application of the trials process used in experimental economics. We demonstrate that the Learning Design is effective in eliminating hypothetical bias in surveys concerning donations to two different public goods.     

Preference uncertainty in contingent valuation

In this paper, the results of empirical studies that applied two widely used methods - numerical certainty scale (NCS) and polychotmous choice (PC) - for estimating preference uncertainty adjusted willingness to pay (WTP) in contingent valuation (CV), are summarized. For this review, a number of conclusions are reached. First, there is a lack of consensus about which method is more appropriate for measuring preference uncertainty. Second, although preference uncertainty information has been found useful in detecting the incidence of hypothetical bias in CV studies, a consensus about a standard certainty threshold (or treatment mechanism) at which hypothetical behaviour converges to real behaviour is yet to emerge. Third, insufficient empirical evidence exists about the causal relationship between preference uncertainty scores and the theoretically expected explanatory variables. Finally, the preference uncertainty adjusted PC and NCS models fail to provide a consistent and more efficient welfare estimate compared to the conventional dichotomous choice certainty model.     

Are Internet surveys an alternative to face-to-face interviews in contingent valuation?

Internet is an increasingly popular data collection mode for stated preference research in environmental economics. However, little is known about how this survey mode may influence data quality and welfare estimates. As part of a national contingent valuation (CV) survey estimating willingness to pay (WTP) for biodiversity protection plans, we assign two groups of respondents either to an Internet or face-to-face (in-home) interview mode. Our design aims to better isolate measurement effects from sample composition effects by drawing both samples from the same sample frame. We find little evidence of social desirability bias in the interview setting or satisficing (shortcutting the response process) in the Internet survey. The share of “don't knows”, zeros and protest responses to the WTP question with a payment card is very similar between modes and equality of mean WTP cannot be rejected. Results are fairly encouraging for the use of Internet in CV as stated preferences do not seem to be significantly different or biased compared to face-to-face interviews.     

教育错配对工资的惩罚效应——来自中国微观面板数据的证据

教育错配如何影响工资?文章基于2010?2014年中国家庭追踪调查面板数据,基于固定效应模型和工具变量估计,测度了教育错配产生的工资惩罚效应及其产生的理论机制.研究表明:过度教育员工每过度一年将承受1.4%的工资惩罚,教育不足员工将获得2.4%的工资红利.工作所需教育水平是40岁以上员工工资的主要决定因素;随着任职生涯的推进,教育错配会得到改善;教育错配与人力资本之间存在补偿机制.文章的政策涵义是:教育主管部门应从市场需求端改革教育体系,提供市场需要的相应技能毕业生.高校应主动顺应社会主义市场经济需求,及时有效地调整学科专业结构和人才培养结构.企业应建立人才识别和多层奖惩机制,充分释放过度教育者的劳动生产率水平.政府应加强就业指导工作,帮助求职者精准定位与其教育水平相匹配的工作,以减少搜寻成本.     

Exchange Rules and the Incentive Compatibility of Choice Experiments

The incentive properties of stated-preference surveys continue to be a central debate in the valuation of public goods. The majority of empirical studies have focused on incentive properties of contingent valuation questions in relation to situations where answers have monetary consequences. This research explores the incentive properties of repeated, attribute-based choice questions when subjects are provided with an explicit connection between choices and outcomes. Two market/provision-rules are investigated: a posted-price market and a plurality-rule vote. These two provision rules are contrasted to treatments in which no provision rule is discussed—subjects are simply asked to choose their preferred alternative. These three hypothetical choice treatments are compared with a binding choice treatment. While none of the public good treatments are theoretically incentive compatible, we include a comparison of hypothetical and binding choices for a private-good that is incentive compatible. The private good experiments indicate that marginal willingness to pay (WTP) estimates from the hypothetical treatment are larger, but not statistically different than corresponding estimates in the binding choice treatment. Results for the public good experiments indicate that marginal WTP estimates from the hypothetical treatments are much larger, and statistically different than corresponding estimates in the binding choice treatment. The bias is largest when no provision rule is discussed. The bias is reduced with the inclusion of a provision rule, but surprisingly, there was no difference across provision rule treatments. Overall, our results indicate that choice experiments involving a public good should include a provision rule to reduce bias, but the resulting marginal WTP estimates may still be more biased, on average, than those arising from contingent valuation survey formats.     

Application of Sample Selection Model to Double-Bounded Dichotomous Choice Contingent Valuation Studies

Modeling households' behavior with the data from a contingentvaluation (CV) survey is often complicated by samplenon-response, which can cause non-response bias and sampleselection bias, leading to inconsistent parameter estimates and adistorted mean willingness-to-pay estimate. This paper reportsthe results of empirical tests for both biases using householdsurvey data in which the double-bounded dichotomous choice CVquestion involved the benefit of a tap water quality improvementpolicy in Korea. No non-response bias, but sample selection bias,is detected in the sample. To correct for sample selection bias,a sample selection model is employed. The authors also discusshow failure to correct for bias may distort aggregate benefitestimates.     

The random expenditure function approach to welfare in RUM: The case of hazardous waste clean-up

This paper presents an application of the random expenditure function approach for welfare analysis in RUM with a non-linear income effect. The measures of expected compensating variation (CV) are first derived as special cases to apply to a two-option conjoint choice-based survey data aimed at deciphering homeowners’ willingness to pay for hazardous waste clean-up. A comparison of the expected CV with the CV based on the representative consumer approximation (CVr) reveals high degree of agreement between the estimates. Using the Diewert and Translog utility specifications the study finds that regardless of the methodology used, welfare estimates are quite sensitive to the functional forms.     

Green Electricity Markets as Mechanisms of Public-Goods Provision: Theory and Experimental Evidence

Utility-based green electricity programs provide market opportunities for consumers to reduce the carbon footprint of their electricity use. These programs deploy three types of public-goods contribution mechanisms: voluntary contribution, green tariff, and all-or-nothing green tariff (Kotchen and Moore, 2007). We extend the theoretical understanding of the all-or-nothing green tariff mechanism by showing that an assumption of warm-glow preferences is needed to explain widespread participation in programs deploying this mechanism. We conduct the first experimental test to compare the revenue generating capacity of a pure public good (based on the voluntary contribution mechanism) and an impure public good (based on the green tariff mechanism). In experimental play, the voluntary contribution mechanism raises 50% more revenue than the green tariff mechanism. With the all-or-nothing green tariff, experimental play and regression estimates show that a warm-glow preference positively affects participation, as predicted by the theory.     

Exact welfare measurement for double-log demand with partial adjustment

This paper demonstrates that a double-log demand with partial adjustment (DLPA) is consistent with the theory of consumer utility maximization. It offers an approach for calculating the compensating variation (CV), the exact welfare effect of a change in a price series when a DLPA is employed. Significant bias may result if the CV is based on a static double-log demand when a DLPA function is appropriate. We revisit a recent study of demand for gasoline in the U.S., finding that the CV based on the static double-log would overstate the welfare effect of a 6-month temporary gasoline tax by 7.5%.     

Better LATE? Instrumental Variables Estimation of the Returns to Job Mobility during Transition

Recent theoretical contributions to the problem of job mobility decisions during the transition from a centrally planned economy to a market economy suggest that individuals self-select into specific forms of job mobility behaviour on the basis of their unobservable characteristics. In this case, standard results from both simple treatment–control comparisons of average income and from OLS regressions of reduced-form earnings equations do generally not identify any causal effect of job mobility on income. This paper addresses the endogeneity problem related to job mobility in a quasi-experimental framework and estimates the returns to (early) job mobility in the Eastern German transition process for the period 1990–96. Identification is based on instrumental variables estimation. Two instruments are suggested that account for some of the variation in the job mobility behaviour throughout transition. They allow further for a natural distinction between forced and voluntary movers on the basis of the local average treatment effect (LATE) interpretation of IV estimates. Estimation results contrast strongly with results from both simple treatment–control comparisons and simple OLS estimation. They suggest negative returns to forced job mobility as opposed to positive returns to voluntary job mobility early in transition, thus stressing the existence of heterogeneous returns to job mobility.     

The incidence of UK housing benefit: Evidence from the 1990s reforms

This paper estimates the incidence of the most important UK rent subsidy, housing benefit (HB). It exploits changes to housing benefit in 1996 and 1997 that reduced the maximum subsidy payable. The research design is based on the fact that the changes only applied to new claimants and not to pre-existing claimants. We use difference-in-differences to estimate the size of the treatment effect. We show that the changes did have an effect on the level of housing subsidy with an estimated fall of 10–15% in benefit receipt in the treatment group relative to the control group. There is also evidence that rents paid fell by 6–11%. We find no evidence this can be explained by a fall in housing consumption by the treatment group. Our estimates imply that between 60% and two-thirds of the incidence of the subsidy reduction was on landlords.     

Splitting leagues: promotion and demotion in contribution-based regrouping experiments

The paper reports an experimental study on a promotion-demotion mechanism to mitigate the free-rider problem in a voluntary contribution setting. The mechanism hierarchically splits a group in two; we refer to one subgroup as the Major league and to the other as the minor league. The most cooperative subject of the minor league is switched with the least cooperative subject in the Major league. The results reveal a significant increase of cooperation levels in both leagues relative to the standard voluntary contribution mechanism. We argue that a lack of sequentially-rational beliefs about continuation payoffs in Major and minor leagues leads to higher equilibrium contributions. The data suggest beyond that, the promotion-demotion mechanism regroups subjects deliberately according to their cooperativeness.     

Keeping up appearances: Motivations for socially desirable responding in contingent valuation interviews

The tendency to give socially desirable rather than true statements of willingness to pay (WTP) is an often reported form of bias in contingent valuation surveys. While previous research on this bias has exclusively focused on the detection of mode effects, the present study directly assesses a respondent's motivation to state WTP in a socially desirable manner. This study tests the effect of three theoretical motivations for socially desirable responding on WTP responses: A general need for social approval, a perceived social norm calling for a high contribution and perceived lack of anonymity of the interview situation. Questions for the empirical assessment of these factors are developed.Results of a valuation study in Southwest China show differing and independent impacts of these factors. While there is no effect of perceived anonymity, need for social approval biases WTP responses upwards but does not influence the general decision to state a positive WTP. It also turns out that rather the fear of losing social status than the striving for higher social approval is the main driver of this bias. Respondents perceiving a social norm for high WTP are more likely to state a positive WTP, but the specific amount is not affected.     

Technology transfer and spillovers from FDI in transition economies: A meta-analysis

In this paper, we conduct a meta-analysis of the literature that empirically examines the microeconomic impacts of foreign direct investment (FDI) in Central and Eastern Europe and the former Soviet Union. The meta-synthesis of estimates collected from relevant studies shows that both the effect size and the statistical significance of the indirect effect of FDI, namely the productivity spillover effect, are obviously lower than those of the direct effect caused by foreign participation in company management through ownership. Moreover, the meta-regression analysis reveals that, probably due to the presence of publication selection bias, previous studies have not yet provided empirical evidence of a non-zero productivity spillover effect in the region. Further research efforts are required to capture the true effect.     

For some mothers more than others

We estimate the effect of family size on female labour supply using data from Poland and instrumenting for family size with twinning at first and second birth. To the best of our knowledge, this is the first study to causally address this relationship in a post‐communist country. We identify the average causal effect of an additional child on mother's employment to be ?7.0 pp, but we do not find significant effects of additional children on female employment among families with two or more children. Furthermore, we identify a positive bias of OLS in the estimates among highly educated mothers and those from younger cohorts.     

The effects of home access to technology on computer skills: Evidence from a field experiment

Computer skills are important for educational and labor market success. This paper examines whether disparities in access to home computers are limiting the acquisition of computer skills. To address problems with selection bias, I use data from a randomized field experiment providing free computers for home use to community college students. I find that the treatment group of low-income students receiving free computers has significantly higher levels of computer skills than the control group of low-income students not receiving free computers. The “intent-to-treat” estimates indicate an increase in high-level computer skills of 17% points, and the LATE estimates indicate a range of 19–23% points. The results are robust to estimation strategy, measurement of the dependent variable, and inclusion of different sets of controls. The benefits appear to be the strongest among young, minority, low-income, and female students.     

Measuring the effects of preservation on farm profits in a continuous treatment setting

Despite billions of dollars of public appropriations to state purchase of development rights (PDR) programmes, there has been limited evaluation of the effects of these investments on the economic performance of preserved farms. This article estimates dose-response functions to evaluate the effects of enrolment in New Jersey’s PDR programme on farm profitability. The generalized propensity score method in a continuous treatment setting is used to address selection bias arising from voluntary programme participation. Treatment effects are measured across treatment levels to determine whether farm profitability is affected differently across levels of programme participation. Our findings reveal that, relative to unpreserved farms, profit per acre tends to increase along lower treatment levels. The profit per acre of preserved farms in the 1–40% treatment range is, on average, $407 higher than that of unpreserved farms in the full sample. Positive profit differentials averaging between $317 and $472 per acre are also observed in the 1–20%, 1–40% and 1–60% treatment quintiles in the farming occupation sample. We do not observe statistically significant profitability differentials when treatment effects are averaged across all positive treatment values.     

Environmental risk and welfare valuation under imperfect information

Consumers are often uninformed, or unsure, about the ambient level of environmental risk. An optimal policy must jointly determine efficient levels of self-protection, information provision, and public risk mitigation efforts. Unfortunately, conventional welfare measures are not amenable to welfare analysis in the presence of imperfect information. We develop a theoretical welfare measure, called quasi-compensating variation, that is a natural extension of compensating variation (CV). We show that this welfare measure offers not only a money metric of the “value of information,” but also a means to appropriately evaluate the welfare effects of various policies when consumers are imperfectly informed about ambient risk. This welfare measure allows us to obtain a number of results that the traditional CV measure fails to offer. In particular, we show that the consumer’s willingness to pay for a (small) environmental risk reduction is higher for those who underestimate ambient risk than for those who overestimate or are perfectly informed if the marginal return to self-protection increases with ambient risk.     

Birth,death and public good provision

We explore the effect of fixed versus dynamic group membership on public good provision. In a novel experimental design, we modify the traditional voluntary contribution mechanism (VCM) by periodically replacing old members of a group with new members over time. Under this dynamic, overlapping generations matching protocol we find that average contributions experience significantly less decay over time relative to a traditional VCM environment with fixed group membership and a common termination date. These findings suggest that the traditional pattern of contribution and decay seen in many public goods experiments may not accurately reflect behavior in groups with changing membership, as is the case in many real-world environments.