Yoshihiko Kadoya | Graduate School of Social Sciences,Department of Economics


Kadoya Lab’s COVID-19 Research Outputs

Kadoya lab(together with HiHER)has actively engaged in COVID-19 related research (including the past ones that can be applied to the current situations). This page lists these research outputs.

COVID-19 Vaccination Policies

Overall population

The worldwide COVID-19 vaccination program is already underway, raising hopes and aspirations to contain the spread of the COVID-19 pandemic that halted economic and social activities. However, the issue of vaccine effectiveness and its side-effects is influencing the potential acceptance of vaccines. In this uncertain situation, we deployed a nationwide survey in Japan, following the Japanese government’s initial phase of COVID-19 vaccination.

  • Kadoya, Y., Watanapongvanich, S., Yuktadatta, P., Putthinun, P., Lartey, S.T., & Khan, M.S.R., Willing or hesitant? A socio-economic study on the potential acceptance of COVID-19 vaccine in Japan, International Journal of Environmental Research and Public Health 2021, 18 (9), 4846
  • Younger population

    Japan has vaccinated its older population; a mass vaccination program for younger citizens is underway. Accordingly, this study investigated vaccine hesitancy among younger Japanese citizens.

  • Khan, M.S.R., Watanapongvanich, S., & Kadoya, Y. COVID-19 Vaccine hesitancy among the younger generation in Japan, International Journal of Environmental Research and Public Health, 2021, 18 (21), 11702
  • Booster Vaccination

    The younger generation’s hesitancy towards the COVID-19 vaccine in Japan received significant attention during the early stages of vaccination. However, there is a lack of a comprehensive study in Japan that analyzes the apprehension towards the third dose of vaccine, commonly known as the booster dose, and its underlying causes. Using data from an online panel survey, Kadoya Lab examined the severity of booster dose aversion among youths of different ages.

  • Khan, M.S.R., Nguyen, T.X.T., Lal, S., Watanapongvanich, S., & Kadoya, Y. Hesitancy towards the Third Dose of COVID-19 Vaccine among the Younger Generation in Japan, International Journal of Environmental Research and Public Health, 2022, 19 (12), 7041
  • Loneliness during the COVID-19 Pandemic

    Overall generation (young and elderly)

    The precautionary measures and uncertainties surrounding the COVID-19 pandemic have serious psychological impacts on peoples’ mental health. We conducted longitudinal survey to investigate loneliness before and during the pandemic among older and younger people in Japan.

  • Khan, M.S.R. & Kadoya, Y. Loneliness during the COVID-19 pandemic: Are older people at higher risk?, International Journal of Environmental Research and Public Health  2021, 18 (15), 7871
  • Sub-simple analysis by age and gender

    Kadoya lab further conducted the subsample analyses of age and gender to uncover the factors that cause people’s loneliness.

  • Khan, M.S.R., Yuktadatta, P., & Kadoya, Y. Who became lonely during the COVID-19 pandemic? An investigation of the socioeconomic aspects of loneliness in Japan, International Journal of Environmental Research and Public Health, 2022, 19 (19), 6242

  • Economic Measures against the COVID-19 Pandemic

    One-time cash payment of JPY 100,000

    In order to curb the economic damage caused by the COVID-19 pandemic on households, the Japanese government distributed a one-time cash payment of JPY 100,000 to every registered resident at the beginning of the pandemic. Conducting a nationwide satisfaction survey with this stimulus policy, Kadoya lab found that those who were male, older, had a higher education level, and had anxiety about the future were less likely to be satisfied with this policy. Having a spouse, being a public official, and having higher household assets or better subjective health enhanced satisfaction with the policy.

    The subsample analyses showed heterogeneity in satisfaction among various socioeconomic groups and in associations between their socioeconomic characteristics and policy satisfaction. The government should design future policies with due consideration of the challenges faced by various socioeconomic groups.

  • Yuktadatta, P., Ono, S., Khan, M.S.R., & Kadoya, Y. Satisfaction with the COVID-19 economic stimulus policy: A study of the special cash payment policy for residents of Japan, Sustainability, 2022, 14 (6), 3401

  • Premium shopping coupon

    The unprecedented outbreak of COVID-19 has triggered a worldwide economic recession. Consequently, governments are pursuing different stimulus packages to alleviate the resulting pressures. We examined one such program intended to enhance consumer spending during an economic downturn. In 2015, the Japanese government implemented a discount shopping coupon scheme, offering a 20% discount on purchases. We aimed to identify the groups of consumers who responded most to the discount shopping coupon scheme.

  • Kadoya, Y., Khan, M.S.R. & Yamane, T. Government’s Stimulus Program to Boost Consumer Spending: A Case of Discount Shopping Coupon Scheme in Japan Sustainability 2020, 12 (9), 3906
  • with COVID-19 era: Health and Productivity Management

    Manufacturing industry

    Employee productivity is a well-studied area, which has been explained in various dimensions. However, there is insufficient research on how workers’ on-job emotional status relates to productivity. We examined the relationship between workers’ emotional states and productivity by assessing on-job emotionality recorded using a specially designed wearable biometric device.

  • Kadoya, Y., Khan, M.S.R., Watanapongvanich, S., & Binnagan, P. Emotional status and productivity: Evidence from the special economic zone in Laos, Sustainability 2020, 12 (4), 1544

  • Traffic Industry

    Drivers’ emotions significantly affect their driving performance and thus are related to driving safety issues. The objective of our study is to examine how taxi drivers’ on-duty emotional states are associated with their driving speed in real driving situations.

  • Kadoya, Y., Watanapongvanich, S., & Khan, M.S.R., How is emotion associated with driving speed? A study on taxi drivers in Japan, Transportation Research (F): Traffic Psychology and Behaviour  2021, 79 (May), 205-216
  • Increasing Financial Crimes during the COVID-19 Pandemic

    Japan has seen an increase in the incidents of financial frauds over the last couple of decades. Although authorities are aware of the problem, an effective solution eludes them as fraudsters use innovative swindling methods and continually change the target group. Using our nationwide Japanese survey in 2020, we investigated the socioeconomic and psychological profiles of victims of trending and special financial fraud such as fictitious billing fraud, loan guarantee fraud, and refund fraud.

  • Kadoya, Y., Khan, M.S.R., Narumoto, J., & Watanabe, S. Who is next? A study on victims of financial fraud in Japan, Frontiers in Psychology  forthcoming
  • Addiction measures during the COVID-19 Pandemic

    Gambling Addiction

  • Watanapongvanich, S., Khan, M.S.R., Putthinun, P., Ono, S., & Kadoya, Y. Financial Literacy and Gambling Behavior in the United States, Journal of Gambling Studies forthcoming

  • Watanapongvanich, S., Binnagan, P., Putthinun, P., Khan, M.S.R.,& Kadoya, Y. Financial Literacy and Gambling Behavior: Evidence from Japan, Journal of Gambling Studies 2021, 37, 445-465

  • Smoking Addiction

  • Khan, M.S.R., Putthinun, P., Watanapongvanich, S., Yuktadatta, P., Uddin, M.A., & Kadoya, Y. Do Financial Literacy and Financial Education Influence Smoking Behavior in the United States?, International Journal of Environmental Research and Public Health 2021, 18 (5), 2579

  • Watanapongvanich, S., Khan, M.S.R., Putthinun, P., Ono, S., & Kadoya, Y. Financial Literacy, Financial Education, and Smoking Behavior: Evidence from Japan, Frontiers in Public Health: Health Economics 2021, 8, 612976

  • Alcohol Addiction

  • Putthinun, P., Watanapongvanich, S., Khan, M.S.R., & Kadoya, Y. Financial Literacy and Alcohol Drinking Behavior: Evidence from Japan, Sustainability 2021, 13 (16), 8858

  • Risk Avoiding Behavior (Exercise habbit)

  • Ono, S., Yuktadatta, P., Taniguchi, T., Iitsuka, T., Noguchi, M., Tanaka, S., Ito, H., Nakamura, K., Yasuhara, N., Miyawaki, C., Mikura, K., Khan, M.S.R., & Kadoya, Y. Financial Literacy and Exercise Behavior: Evidence from Japan, Sustainability 2021, 13 (8), 4189

  • Yuktadatta, P., Khan, M.S.R., & Kadoya, Y. Financial Literacy and Exercise Behavior in the United States, Sustainability, 2021, 13 (16), 9452
  • Family Care-Giving during the COVID-19 Pandemic

  • Khan, M.S.R., Watanapongvanich, S., & Kadoya, Y. Family caregiving attitudes: Implications for post-pandemic eldercare in Japan, Gérontologie et société 2021, 43 (165), 1-18
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