Professor Hidehiko Ichimura of the University of Tokyo will share recent results from his research on the health of older adults and the retirement process in Japan. His research draws upon a unique data source, the Japanese Study of Aging and Retirement (JSTAR). This rich dataset provides information on how middle-aged and elderly Japanese live in terms of economic, social, and health outcomes, and how these interact with their family status. The JSTAR project aims to provide longitudinal data enabling detailed policy-relevant comparisons to other industrialized countries (e.g. the Survey on Health, Aging and Retirement in Europe, the US Health and Retirement Study, the English Longitudinal Study on Aging, and similar surveys now launched in Korea, China, and India).

Professor Ichimura received his BA in economics from Osaka University in 1981 and his Ph.D. in economics from the Massachusetts Institute of Technology (MIT) in 1988. He has taught at the University of Minnesota, the University of Pittsburgh, and University College London. He is now Professor in the Graduate School of Public Policy and Graduate School of Economics at the University of Tokyo. 

China and some other Asian countries have experienced a large surplus of men of marriageable age. The existing literature studies the impact of sex imbalance using aggregate sex ratios, such as at the county, city, or province level. However, these studies may miss important impacts on health and behavior because the relevance of surplus sons to family decisions mainly stems from pressure conveyed through social interactions with the local reference group.

This paper draws from unique social network data, collected from households' long-term spontaneous gift exchange records (li dan), combined with household panel data from 18 Chinese villages to explore the prevalence of men's localized pressure to get married. The surveyed villages are home to Chinese ethnic minorities, which largely circumvents endogenous fertility decisions on the first-born child due to the implementation of One Child Policy and its associated relaxations afterwards. To identify the effect of pressure to find wives for their sons on parental risky behavior, we focus on comparing families with a first-born boy versus a first-born girl and distinguish the network spillover effect from the direct effect.

The spatial econometric decompositions suggest that the pressure mainly originates from a few friends with unmarried sons and unbalanced sex ratios in the friendship networks, though own village sex ratio and having an unmarried son also affects parental risk-taking behavior. The results are consistent across specifications allowing for long-run and short-run effects. We also find similar patterns for parental working hours, their likelihood to engage in entrepreneurial activities and decision to migrate. In contrast, parents with a daughter do not demonstrate this pattern. Since the sex ratio imbalance in China will probably worsen in the next decade, disentangling the real sources of marriage market pressure may help design policies to improve parental well-being.

Dr. Xi Chen's main research interests involve health economics and development economics in the developing contexts. He recently completed his PhD in applied economics at Cornell. His research seeks to better understand how social interactions affect health behavior and outcomes, how socioeconomic status drives social competition. Most of his current work draws on primary data from China and secondary data from India and Indonesia.

When the Soviet Union dissolved at the end of 1991, the independent Republic of Kazakhstan was left with the world’s fourth largest nuclear arsenal and a huge nuclear infrastructure, including lots of fissile materials, several nuclear reactors, the Ulba Metallurgical Plant, and the enormous Semipalatinsk Nuclear Test Site. The return of the nuclear weapons to Russia (thanks to former Secretary of Defense William Perry), the transport of vulnerable highly-enriched uranium to the U.S. (Project Sapphire), the disposition of the fast reactor fuel, and upgrading of security and safeguards at its research reactors have been the subject of numerous reports. The story of what has been done with what the Soviets left behind at the test site and the dangers it presented will be the main topic of my presentation. It is a great story of how scientists from three countries worked together effectively among themselves and with their governments to deal with one of the greatest nuclear dangers in the post-Cold War era.

About the speaker: Siegfried S. Hecker is co-director of the Stanford University Center for International Security and Cooperation, Senior Fellow of the Freeman Spogli Institute for International Studies, and Professor (Research) in the Department of Management Science and Engineering. He also served as Director of the Los Alamos National Laboratory from 1986-1997. Dr. Hecker’s research interests include plutonium science, nuclear weapon policy and international security, nuclear security (including nonproliferation and counter terrorism), and cooperative nuclear threat reduction. Over the past 20 years, he has fostered cooperation with the Russian nuclear laboratories to secure and safeguard the vast stockpile of ex-Soviet fissile materials. His current interests include the challenges of nuclear India, Pakistan, North Korea, the nuclear aspirations of Iran and the peaceful spread of nuclear energy in Central Asia and South Korea. Dr. Hecker has visited North Korea seven times since 2004, reporting back to U.S. government officials on North Korea’s nuclear progress and testifying in front of the U.S. Congress. He is a fellow of numerous professional societies and received the Presidential Enrico Fermi Award.