ANNUITIZED ASSET ADEQUACY IN JAPAN: THE DEMAND FOR INDIVIDUAL PENSIONS

In this paper, I analyze the impact of social security wealth, retirement payments, and living expenses during retirement on people's retirement savings in general, and on their individual pension holdings in particular, using micro data from a 1996 Japanese household survey. I confirm a replacement effect of social security on saving for all types of households and on individual pensions for self‐employed households only. This suggests that the social security assets of self‐employed households are less than their optimal level of annuitized assets and that they would increase their demand for individual pensions if social security benefits were to be reduced.     

PRIVATE PROVISION OF PUBLIC GOODS AND INFORMATION DIFFUSION IN SOCIAL GROUPS

I describe a dynamic model of costly information sharing where private information affecting collective‐value actions is transmitted by social proximity. Individuals make voluntary contributions toward the provision of a pure public good, and information transmission about quality of provision is a necessary condition for collective provision to take place in a stationary equilibrium. I show that unlike in the case of private goods, better informed individuals face positive incentives to incur a cost to share information with their neighbors and that these incentives are stronger and provision of the pure public good greater the smaller are individuals' social neighborhoods.     

环境规制下本土技术转移与我国高技术产业创新效率

采用SBM-Undesirable模型测度环境规制下高技术产业创新效率,构建计量经济学模型分析本土技术转移与国外技术引进、FDI的作用关系及其对创新效率的影响。基于省际动态面板数据的系统GMM估计得出,本土技术转移与高技术产业创新效率显著正相关,前者与国外技术引进存在互补效应,与FDI则呈现替代效应。     

Multi-agent simulations to explore rules for rural credit in a highland farming community of Northern Thailand

Multi-agent systems (MAS) open new modelling and analysis perspectives in ecological and social sciences. An original characteristic of the companion modelling (ComMod) approach adopted in this case study is the co-construction and use of a MAS model with and for local stakeholders such as farmers and local administrators. Alternating iteratively field and modelling activities, this approach facilitates collective learning among local stakeholders and between them and the researchers. Combining the use of MAS models with role-playing games (RPG), the described experiment aimed to facilitate collective decision-making in a socially heterogeneous community of small farmers in mountainous Northern Thailand about the local rules for the allocation of rural credit to allow a more equitable and extensive process of expansion of non-erosive perennial crops in a watershed prone to erosion. This paper presents the MAS model and the results of a series of simulations exploring the ecological, social and economic effects of various rules for formal and informal credit suggested by the villagers-participants. Six scenarios considered as pertinent to further explore the participants' suggestions were defined based on different combinations among the following three variables: (i) Duration for the reimbursement of loans, (ii) Mode of allocation of formal credit among three different types of farms, (iii) Configuration of networks of acquaintances for access to informal credit.Drawing on this case study, we first elaborate on the potential of bottom-up models such as MAS to analyze the functioning of agricultural systems, in particular farm differentiation and rural credit dynamics. We highlight the ability of MAS to deal with interactions between social and ecological dynamics and to provide an alternative to classical economic thinking by analyzing the effects at the village level of social interactions among individuals. MAS allow us in particular to trigger an overlooked but nevertheless fundamental aspect of socio-ecological systems, i.e. social capital which is a determining factor when dealing with sustainability issues. The second question addressed in this paper deals with the potential and limits of MAS models to support a bottom-up (or participatory) modelling approach. This experiment suggests that the usefulness of models relies much more on the modelling process than on the model itself, because a model is usually useless if it is misunderstood by its potential users, or if it does not respond to their current preoccupations. The intuitive representation of real systems provided by MAS and their high flexibility are the two underlined characteristics favouring their appropriation by local stakeholders.     

Measuring Peer Effects on Youth Smoking Behaviour

This paper examines the role of peer effects in teenagers' smoking behaviour in the U.S.A. I present a random utility model that incorporates complementarity between individual and peer smoking. A Markov process model of smoking interactions between individuals is presented. I estimate the structural parameters of the model using a steady-state distribution that is determined by the Markov process. The empirical results strongly support the presence of positive peer effects. Interestingly, peer interactions are found to be stronger within the same gender than across genders. The same result is found for race. Moreover, a multiplier effect is found.     

Social Relations and Endogenous Culture

The current state of economics as a science is critically evaluated in view of its lack of emphasis on sociological and psychological factors. In particular, I argue that humans are embedded in social structures and that they choose actions taking account of the social contexts in which they live and the social interactions to which they belong. Preferences then should be considered not as exogenously given but as endogenously evolved, allowing for bounded rationality and psychological factors. I provide a brief sketch of the possible model formulation for a more desirable theory, invoking network theory and an indirect evolutionary approach. JEL classification numbers: A12, A13, B40.     

International migration and trade agreements: The new role of PTAs

This paper provides an empirical analysis of the relationship between preferential trade agreements (PTAs) and bilateral migration flows. Building on the empirical literature on the determinants of migration flows, I estimate a modified gravity model to assess the role of PTAs and their content on bilateral migration flows. Using a sample of 29 OECD destination countries over the period 1998–2008, I show a strong positive effect of PTAs on bilateral migration flows. I find that the content of PTAs also matters: when visa‐and‐asylum and labour market related provisions are included in PTAs, this further stimulates bilateral migration flows. Different estimation strategies, including instrumental variables, are employed to address the potential endogeneity bias problems related to PTAs and their content.     

政府关注视角下财政分权对社会参与研发积极度的影响——一个中介效应模型检验

揭示财政分权影响社会参与研发投入的规律对于我国加强和完善地方政府研发投入管理具有重要意义。理论研究表明,财政分权对社会参与研发积极性的影响存在一条由地方政府研发关注度作为中介变量的中介路径。基于此,以2009—2017年中国内地31个省市面板数据为样本,选取地方政府研发关注度作为中介变量,运用基于Bootstrap方法改进的中介效应模型,就全国、分地区、分时段的财政分权对地方政府引导社会参与研发投入的影响进行实证研究。结果表明：从全国和分地区看,财政分权对地方政府引导社会参与研发投入的影响均存在不同程度的中介效应或直接作用,财政分权程度提高会对地方政府引导社会参与研发投入产生不同程度的正向影响。从分时段看,财政分权对社会研发积极度影响的中介效应不存在时段差异。     

How history matters for student performance. lessons from the Partitions of Poland

This paper examines the effect on current student performance of the 19th century Partitions of Poland among Austria, Prussia and Russia. Using a regression discontinuity design, I show that student test scores are 0.6 standard deviations higher on the Austrian side of the former Austrian-Russian border, despite the modern similarities of the three regions. However, I do not find evidence for differences across the Prussian-Russian border. Using a theoretical model and indirect evidence, I argue that the Partitions have persisted through their impact on social norms toward local schools. Nevertheless, the persistent effect of Austria is puzzling, given the historical similarities of the Austrian and Prussian education systems. I argue that the differential legacy of Austria and Prussia originates from the Austrian Empire’s policy to promote Polish identity in schools and the Prussian Empire’s efforts to Germanize the Poles through education.     

How Do Neighbors Influence Investment in Social Capital? Homeownership and Length of Residence

This paper uses individual data from Japan to explore how the circumstances of where a person resides is related to the degree of their investment in social capital. Controlling for unobserved area-specific fixed effects and various individual characteristics, I found (1) not only that homeownership and length of residence are positively related to investment in social capital, but also that rates of homeownership and long-time residency in a locality increase an individual’s investments in social capital. Also, (2) the effects of local neighborhood homeownership and local length of residence are distinctly larger than those of an individual’s homeownership or length of residence.     

Does fiscal decentralization affect local governments' strategic behaviours? Evidence from South Korea

Local governments tend to show strategic behaviours when making their spending decisions. However, few studies have examined strategic behaviours when promoting fiscal decentralization. Thus, this study empirically examines the presence of strategic interactions in expenditure decisions in South Korea as well as how fiscal decentralization affects those interactions, using a panel data set from 2010 to 2017. The results demonstrate that a local government mimics other governments' spending when those governments' residents share similar age demographics. Moreover, local governments in South Korea engage in strategic interactions as their expenditure side becomes more decentralized. However, local governments tend to demonstrate less isomorphic behaviour in welfare spending decisions when they have higher revenue decentralization. This is because local governments have no motive to emulate other welfare policies, as the central government delegates the provision of social services to local governments by providing grants with strings attached.     

Signaling in social network and social capital formation

This paper presents a model of social capital and social network formation. The key interaction within the model is that whom an individual chooses to become friends with affects the value (social capital) of the friendship. In the model, how a player searches for and then forms friendships reveals how willing she is to engage in cooperation with a potential friend. Individuals observe their local network structure (friends and cliques) and the actions of players within these. Willingness to cooperate is private information and is captured by the discount factor of an individual. Cooperative types have high discount factors and can signal their type by forming a clique through befriending a friend of a friend. Uncooperative types do not form these kinds of friendships because of the local observability of their actions to all members of a clique. Thus, when a player meets someone with whom she shares a friend, her belief that the individual has a high discount factor is greater than the population average. In this sense, people “trust” each other more when they share a friend in common. Finally, I relate the primitives of the model to characteristics of the implied social network by nesting the sequential equilibrium in an algorithm of network formation proposed by Jackson and Rogers (Am Econ Rev 97(3):890–915, 2007). The model highlights a trade-off between maximizing the total amount of social capital in a society and distributing it equitably across individuals.     

Trust and reciprocity in inter-individual versus inter-group interactions: The effects of social influence, group dynamics, and perspective biases

Using an experimental trust game, I examine whether the perspectives and behavior of group representatives and consensus groups differ from those of the same individuals in an analogous inter-individual situation. A primary goal of this research is to extend past work on trust and reciprocity by examining the impact of the social contexts within which social interactions are characteristically embedded. Specifically, this research concerns whether norms and dynamics of trust and reciprocity differ in the contexts of inter-individual and inter-group interactions. First, I examine whether dynamics of trust and reciprocity differ in various inter-group interactions where inter-group decisions are operationalized as 1) autonomous group representatives, i.e., individuals who are given the responsibility of unilaterally making a decision on behalf of a three-person group engaging with a group representative of another such group; and 2) consensus groups, i.e., group members making a consensus trust or reciprocity decision for their groups via a collective process with another such group. Results of these studies show that 1) people trust less and reciprocate less when responsible for a group or organizational decision as autonomous group representatives; 2) consensus groups do not differ from individuals in their level of trust but show dramatically less reciprocity. The group consensus mechanism in fact produced by far the lowest reciprocity level, significantly lower than that exhibited by either individuals or autonomous group representatives. Thus, inter-group trust and reciprocity dynamics are not readily inferable from their inter-individual counterparts. Moreover, an important implication is emerging here: the extent and direction of the discrepancy between individual and group choices in regard to trust and reciprocity levels and possibly other social preferences in general may depend importantly on the precise details of the group decision-making mechanism, for example whether decisions are made consensually, by majority vote, or by a group leader or representative. In addition to examining the level of trust and reciprocity that occur in these various situations, I also studied, using both behavioral and questionnaire data, the roles of self-interest, social influence, and group dynamics in trust and reciprocity perceptions and behavior. The results showed that there exist discrepancies between behavioral forecasts and the actual behavior, and that trusting behavior is driven strongly by expectation of level of reciprocation, while reciprocating behavior is driven strongly by the difference between trust expectation and actual trust received.     

Diversity, persistence and chaos in consumption patterns

In this paper we present a model from which discretionary consumption dynamics can be analyzed as global properties emerging from the endogenous transformation of a society inhabited by boundedly rational interactive consumers. By considering local and global interactions among consumers, we show that behavioral diversity plays a central role in the evolution of consumption patterns. The analysis of the model reveals the existence of a regime characterized by the persistence of different social standards, and a time evolution of the social distribution of behavioral patterns towards a heteroclinic cycle. In some cases the evolution seems to be chaotic, generating unpredictable, erratic dynamics of the aggregate social indices (average or social propensity for discretionary consumption).      

Special interest groups and the allocation of public funds

I propose a fully rational model of government contracting that explains differences in local government spending from grants and other income. In this model, violations of fungibility arise from dynamic interactions between politicians and interest groups with the ability to raise funds for the local government. The predictions of the model are tested by exploiting unique features of windfalls received by states under a settlement with the tobacco industry. Although windfalls are legally unrestricted, the median state increased spending on tobacco control programs from zero to $2.30 per capita upon receipt of funds. The marginal propensity to spend on such programs is 0.20 from settlement revenue and zero from overall income. States which were not involved in the settlement lawsuits spend less. These results cannot be explained by existing models in the literature.     

The employment dynamics of less‐educated men in the United States: The role of self‐employment

Using data from the 1979 National Longitudinal Survey of Youth, I construct a sample of working‐age males and examine the employment dynamics with a particular focus on the role of self‐employment for less‐educated men in the US. I find that men responding they had at some point been self‐employed tend to spend less time in non‐employment than other less‐educated men. The results from the dynamic multinomial logit model reveal positive aspects of self‐employment by indicating that less‐educated men who were self‐employed in the previous year were less likely to be non‐employed in the future as compared to those who were paid workers in the previous year.     

Ethics and social capital for global well-being

Social capital is associated with considerable benefits for individuals and communities. Because some social capital is non-excludable, people may be disinclined to undertake activities that will create it. This is especially likely when the norm of self-interest is prominent. In addition, given the birds of a feather phenomenon, social capital appears to thrive in homogenous networks, and to languish in the face of diversity. I argue that social capital meets the criteria of a moral concept and that treating it as such can address these vulnerabilities. In particular, as a moral principle, social capital would be more demanding than mere self-interest and the moral requirement of universality would trigger a duty to act impartially with respect to networks. Since market interactions can create social capital, and social capital is a moral good, market interactions are in part constitutive of the good. I also argue that global social capital is important for both global well-being and sustainable globalization. Given the benefits of social capital, including it in the choice architecture as a moral principle will be worth the investment.     

The role of vaccine effectiveness on individual vaccination decisions and welfare

This paper examines a theoretical model designed to characterize a static, individual vaccination decision environment. I identify and characterize both equilibrium and socially optimal vaccination behavior and determine how this behavior changes as the effectiveness of the vaccine changes. I also evaluate the individual and social welfare implications of a change in vaccine effectiveness. I find that under certain conditions, an increase in vaccine effectiveness can decrease the number of agents vaccinating in equilibrium due to the positive external effects of vaccination. Notably, it is also possible for individual and total welfare to decrease. This is an undesirable, and perhaps unexpected, consequence of better vaccines. Fortunately, welfare at the social optimum always increases as vaccine effectiveness increases. However, equilibrium behavior often falls short of the social optimum due to the positive externalities created by vaccinating.     

The Border as a Marker of Territoriality: Multi-Scalar Perspectives and Multi-Agent Processes in a South American Borderland Region

The ambivalence of borders, as both bridges and barriers, is analysed in the South American borderlands, in the cross-border region between Bolivia, Peru and Brazil. The main hypothesis behind this work is that borders not only refer to the state but they are also a result of a social construction. Through their practices and narratives, the actors involved shape the border configuration. Through a multi-scalar approach (from a continental to a local level) and by collating practices and representations of various social agents (from continental organisations to the complexity of social groups on the border), I show that different territorial complexes converge on the border and I explain the spatial dialectic of the latter. Two ideas emerge as a conclusion to this study: the co-existence of territorialities that are not so exclusive and the key role played by the state despite the changes it undergoes.