Can sickness absence be affected by information meetings? Evidence from a social experiment

During the last decade several empirical studies have stressed the importance of norms and social interactions for explaining sickness-absence behavior. In this context, public discussions about the intentions of the insurance, and of the rights and duties of the receivers, may be important for reducing the sickness absence. In this article, we study whether information meetings about the Swedish sickness insurance affect the length of sickness-absence spells. The study is based on experimental data on individuals with weak labor market attachments. The displacement of when the call to the meeting was sent out was randomized. Comparing the survival functions of those called immediately with those whose calls were delayed (by about 30 days) makes it possible to study whether the length of sickness absence is affected by receiving the call earlier. The result suggests that the length is reduced by, on average, 20%. In the long term (12 months later), there is no effect of the information meeting. This suggests that attendance to the information meeting does not change individuals’ long-term behavior.     

Are impatient farmers more risk-averse? Evidence from a lab-in-the-field experiment in rural Uganda

Based on data from a field-experiment in rural Uganda, we show that impatient farmers are more risk-averse than patient farmers. We relied on a simplified version of the Convex Time Budget (CTB) method to elicit farmers’ time preferences and on an independent method for eliciting their risk-preferences. We report two important findings. First, we show that our simplified CTB method applied to farmers from Uganda replicates the key findings of Andreoni and Sprenger’s lab experiments that involved student subjects. Second, we establish the existence of a negative correlation between risk tolerance and impatience, based on two independent measures.     

How to hire helpers? Evidence from a field experiment

How to hire voluntary helpers? We shed new light on this question by reporting a field experiment in which we invited 2859 students to help at the ‘ESA Europe 2012’ conference. Invitation emails varied non-monetary and monetary incentives to convince subjects to offer help. Students could apply to help at the conference and, if so, also specify the working time they wanted to provide. Just asking subjects to volunteer or offering them a certificate turned out to be significantly more motivating than mentioning that the regular conference fee would be waived for helpers. By means of an online-survey experiment, we find that intrinsic motivation to help is likely to have been crowded out by mentioning the waived fee. Increasing monetary incentives by varying hourly wages of 1, 5, and 10 Euros shows positive effects on the number of applications and on the working time offered. However, when comparing these results with treatments without any monetary compensation, the number of applications could not be increased by offering money and may even be reduced.     

Are there spillover effects of large firms’ growth in supply chain networks? Evidence from the Korean economy

Previous literature has found that inter-firm cooperation leads to higher growth rates for small and medium enterprises (SMEs). However, these studies have focused only on direct effects, such as subcontracting, rather than on spillover effects in supply chain networks (SCNs). Regarding the spillover effects, this article investigates whether a large firm’s growth leads to the growth of the directly and indirectly related SMEs in its SCN, using Korean firm-level data with the system Generalized Method of Moments (GMM) approach. The estimation results show that increases in the sales of large firms significantly affect the growth rates of the related SMEs. These effects, however, diminish as the relationship with the large firm goes down from the first vendor to the second vendor and from the second vendor to the third vendor. In the case of Korea, when a large firm grows by 1%, the first vendor grows by 0.38–0.44%, but the growth rates of the second and third vendors are only 0.036–0.047% and 0.003–0.005%, respectively. Thus, while there are spillover effects, the effects are weak. We discuss what these findings mean for national economic growth.     

Do entry barriers reduce productivity? Evidence from a natural experiment

I study how entry barriers affect productivity by exploiting the collapse of the US sugar cartel as a natural experiment. Using difference-in-difference estimations, I find the eradication of entry barriers caused a 35% increase in productivity within the treatment group.     

Are valuation effects desirable from a global perspective?

Recent studies have emphasized the role of valuation effects due to exchange rate movements in easing the process of adjustment of the external balance of a country. This paper asks to what extent valuation effects are desirable from a global perspective as a mean to achieve an efficient allocation of resources. In a frictionless world, it is desirable to have large movements in prices and exchange rates. But once a small degree of price rigidity is introduced not only should prices be stabilized but also the response of the exchange rate should be muted. There is a minor role for valuation effects that depends both on the size and composition of assets and liabilities.     

Are income and consumption taxes ever really equivalent? Evidence from a real-effort experiment with real goods

The public finance literature demonstrates the equivalence between consumption and labor-income (wage) taxes. We introduce an experimental paradigm in which individuals make real labor-leisure choices and spend their earned income on real goods. We use this paradigm to test whether a labor-income tax and an equivalent consumption tax lead to identical labor-leisure allocations. Despite controlling for subjects' work ability and inherent labor-leisure preferences and disallowing saving, subjects reduce their labor supply significantly more in response to an income tax than to an equivalent consumption tax. We discuss the economic implications of a policy shift to a consumption tax.     

Will knowing diabetes affect labor income? Evidence from a natural experiment

This paper analyzes the impact of diabetes awareness on labor income using data from a natural experiment in China. We find that diabetes in general leads to a 16.3% decrease in annual income after people being diagnosed, and the adverse impact is heterogeneous across different populations.     

Do watching eyes affect charitable giving? Evidence from a field experiment

The presence of implicit observation cues, such as picture of eyes, has been shown to increase generosity in dictator games, and cooperative behavior in field settings. I combine these approaches, by testing if a picture of watching eyes affects unconditional giving in a natural environment, where the recipient is a charity organization. Taken together, this study reduces the influence of three potential confounding factors in previous experiments: (i) experimenter demand effects, (ii) that the facial cue reminds subjects of a human counterpart, and (iii) a social multiplier effect. Specifically, the paper reports results from an experiment, conducted in a Swedish supermarket chain, where customers face a naturally occurring decision problem. People who recycle cans and bottles have to choose whether to keep the recycled amount or donate it to a charity organization. By posting a picture of human eyes on recycling machines, I am able to test whether this causes an increase in donations to the charity. Based on a sample covering a 12-day period, 38 stores and 16775 individual choices, I find no general effect. However, when controlling for store and day fixed effects, and using a proxy for store attendance, the picture of eyes increased donated amount by 30 percent during days when relatively few other people visited the store. This result gives further support to the conclusion that subtle social cues can invoke reputation concerns in humans, although the relatively small effect suggests that previous estimates could be biased upward, or at least that the influence of observational cues is context dependent.     

Does oil corrupt? Evidence from a natural experiment in West Africa

This paper explores the oil discovery announcements in Sao Tome and Principe (1997-1999) to assess the role of natural resources in determining corruption. For this purpose, we use a natural experiment framework which contrasts Sao Tome and Principe to Cape Verde, a control West African country sharing the same colonial past and important recent economic and political shocks. Our measurement is based on tailored household surveys we conducted in both island countries. The unique survey instrument was retrospective and used personal histories to elicit memories from the respondents. We analyze changes in perceived corruption across a wide range of public services and allocations. We find clearest increases on vote buying, education (namely in the allocation of scholarships) and customs, ranging from 31 to 40% of the subjective scale. We interpret these findings as symptoms of increased competition for core state resources.     

Does preschool education attendance matter? Evidence from a natural experiment in Spain

The non-compulsory and non-free of charge character of preschool education level before 3 years old in Spain raises some doubts about the exogenous nature of this variable. This article provides new evidence about the impact of preschool years on educational outcomes by exploiting a peculiar Spanish database that supplies information on two classrooms at fourth grade in primary schools where students were randomly allocated into each group. Using an identification strategy that reproduces a natural experiment, we find that belonging to the group with more average years of preschool education significantly and positively impacts on fourth-grade students’ average outcomes. Particularly, an increase of one standard deviation in the difference in years of preschool attendance results in an increase of 0.16 (0.13) standard deviations in the group achievement for mathematics (reading). In view of the importance of preschool education and considering that preschool attendance before 3 years old is related with socio-economic variables, we conclude that extending free preschool education to the 2-year-old age group in Spain should be considered especially for students in families with less favourable backgrounds.     

Is high-speed rail heading towards a low-carbon industry? Evidence from a quasi-natural experiment in China

Existing studies have investigated the environmental dividends of substituting high-speed rail (HSR) for other energy-intensive vehicles from an engineering standpoint, but they have yet to explore the economic effects of HSR and the associated carbon emissions reduction benefits. To fill the research gap, we use panel data from 285 Chinese cities between 2004 and 2014, and employ a spatial difference-in-differences model to empirically examine the impact of HSR opening on industrial CO₂ emissions. After controlling for spillover effects from neighboring HSR cities, our results show that cities offering HSR services significantly reduce their own industrial CO₂ emissions. This finding is robust and is unaffected by outliers, control group selection, time trends, geography and expectation factors, or endogeneity. The mechanism test reveals that the structural transformation effect, technological innovation effect, and investment attractiveness effect are three intermediate influence channels. Further research finds that the emissions reduction benefit increases as the spatial and temporal intensities of HSR openings ascend the ladder, and HSR services have a spillover effect within a 300-kilometer radius. Moreover, the carbon benefit of China’s HSR far surpasses its carbon footprint, indicating that China’s HSR is green after accounting for economic emissions reductions that were often neglected in prior research. Based on these findings, we recommend that China accelerate HSR expansion in order to reduce carbon emissions in a scientific and responsible manner.     

Are estimated peer effects on smoking robust? Evidence from adolescent students in Spain

Adolescent smoking is one of the most pressing public health problems. The objective of this paper is to analyse the influence of peer pressure on adolescent cigarette consumption. More concretely, we explore the significance and robustness of the peer effects using several estimation methods employed in the existing literature. On the basis of the data provided by the 2004 Spanish survey on drug use in the school population, we estimate the probability of being a smoker by two-stage models. The results reveal that when we use standard errors used in the literature the class peer variable appears to be significant. However, the class peer variable is not significant when we calculate more exigent standard errors, a result that is robust across all specifications. The paper suggests the need for a more cautious interpretation of the peer effects found previously in the literature until a deeper analysis confirms the robustness of the peer effects.     

International or national implementers—Who is better? Evidence from a framing experiment

Behavioral economics has shown that changing small features in framing a context or action may drastically change behavior. A key factor characterizing most development interventions is the salience of either a local or an international implementer. Using the setup of an intervention conducted in Indonesia, we show that the study population in the Acehnese context exhibits higher levels of support for the project if the participation of international actors is highlighted. We find that previous experience with the respective actor is pivotal. Qualitative evidence suggests that internationals' perceived skills drive results, highlighting the importance of strengthened local capacities for positive experiences with local implementers. Overall, the study underlines the benefits of linking framing experiments to the actual experiences of respondents to generate insights into the real world.     

Are banks public utilities? Evidence from Europe

The regulatory response to the global financial crisis has been to instal a myriad of new rules in order to improve bank capital and liquidity, as well as to reduce systemic risks through structural reform. All these new rules place a straightjacket around banker’s activities and inhibit their operational freedom. This new environment has made European banks look less like private free-wheeling profit-maximising firms and more like public utilities. The utility services banks provide to society means that they should be overseen even more heavily. This includes greater regulatory oversight of bank pricing, profitability and service provision.     

Are social,financial, and human capital value enhancing? Evidence from Taiwanese firms

This study examines the effects of social, financial, and human capital on the financial performance (i.e., Tobin's q) of Taiwanese firms in 2007. We find that social capital, as measured by total lending and borrowing among related-party transactions, has a positive effect on a firm's value. Human capital, such as employee productivity and research and development (R&D), also has significant positive effects on financial performance. In addition, a higher firm value is found to be associated with a better credit rating for the firm.     

Are distance effects really a puzzle?

Given the distance proxies for trade costs, the onset of globalization implies that geographical distance would matter less for trade. However, year-on-year regressions of a log-linearized gravity model estimated by the ordinary least squares (OLS) method usually suggest that the negative impact of distance on trade is rising since the 1950s during the late 20th century. These seemingly counter-intuitive results may occur due to the omission of the extensive margin as well as the neglect of the Jensen's inequality. This paper investigates these two potential solutions but that only the second seems to work. After considering Jensen's inequality, the distance effects declined over the period 1950–1999. In addition, this paper proposes a simple theoretical model to identify trade costs. The empirical results also show a declining trend of trade costs over the same time period.     

Is there a quality bias in the Canadian CPI? Evidence from microdata

Rising consumer prices may reflect shifts by consumers to new higher‐priced products, mostly for durable and semi‐durable goods. I apply Bils’ (2009) methodology to newly available Canadian consumer price data for non‐shelter goods and services to estimate how price increases can be divided between quality growth and price inflation. I find that less than one third of observed price increases during model changeovers should be attributed to quality growth. This implies overall price inflation close to inflation measured by the official index. I conclude that, according to Bils’ methodology, the quality bias is not an important source of potential mismeasurement of CPI inflation in Canada.     

Does non-employment based health insurance promote entrepreneurship? Evidence from a policy experiment in China

Previous researchers have shown that employment-based health insurance lowers job mobility and deters entrepreneurship. The Urban Resident Basic Medical Insurance (URBMI) program, piloted in 2007 in China and fully established in 2009, offers health insurance to about 271 million urban residents without formal employment. Before the implementation of URBMI, most urban residents obtained health insurance through their employers, and therefore a large number of unemployed and self-employed individuals were uninsured. Thus, URBMI creates a new insurance option that does not depend on formal employment and may promote entrepreneurship. We take advantage of this policy change to evaluate the effect of URBMI on self-employment. Using 2000–2011 data from the China Health and Nutrition Survey and a difference-in-differences approach with propensity score weighting, we found that URBMI increased self-employment rate by at least 8.73% for the overall population. The result was mainly driven by the URBMI’s impact on unhealthy workers, individuals with 12 years of schooling or less, and workers above 30 years old.     

How does anti-corruption affect firm labour inputs? Evidence from a quasi-natural experiment in China

This study investigates the impact of anti-corruption on firm labour inputs. Using the province-by-province rollout of the central inspection team campaign in China, we find that the labour intensity rises by 9% in the firms located in the provinces inspected by the central inspection teams. Moreover, firms with low corruption are more susceptible to the policy shock.