• Energy Research

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. This study examined the relationship between workers’ emotional states and productivity by assessing on-job emotionality recorded using a specially designed wearable biometric device. The experiment was conducted at KP Beau Lao Co. Ltd., a Japanese plastic toys and cosmetic products company in Savannakhet province in Southwestern Laos. Participants were 15 plastic toy painters. Mental status, daily output, and other issues were recorded for three consecutive working days. Using random effects panel regression models, we examined how productivity, operationalized as the log of daily output, was related to workers’ emotional states, including the amount of time workers reported being happy, angry, relaxed, and sad. We controlled for conversation time, heart rate, and other demographic features. The results revealed that happiness, and no other emotional state, was significantly and positively related to productivity. Such findings suggested that workers’ emotional states must be addressed as part of an organization’s operational strategy to ensure higher productivity.

The existing literature considers financial literacy to be a proxy for rational decision-making instruments. Although there is empirical evidence on the impact of financial literacy on improving rational decision-making ability, it is not yet known whether financial literacy reduces irrational decisions. Impulsive decisions are a form of irrationality where people prefer smaller but earlier rewards over larger but delayed rewards. Thus, impulsive decisions lead to suboptimal decisions in terms of utility gain. This study investigated whether financial literacy reduces impulsivity in financial and economic decisions. We use data from the Preference Parameter Study (PPS) of Osaka University. We measure hyperbolic discounting as a proxy for impulsive decision making. To control for the endogeneity bias between financial literacy and hyperbolic discounting, we use childhood experiences of talking about finances with parents as an instrumental variable. Our probit regression results show that financial literacy is negatively associated with hyperbolic discounting, after controlling for endogeneity bias. Furthermore, we observed that the effect was significant among respondents aged over 40 and among female respondents. Our results suggest that authorities should consider using financial literacy as an alternative policy intervention to change impulsivity preferences.

Although studies have explored how loneliness varies between rural and urban areas during the COVID-19 pandemic, the results have been inconsistent, and most studies are observational. Therefore, it remains unclear how urban–rural differences affected loneliness in a pandemic. Our study uses nationwide data to clarify this, covering periods before and during the pandemic. We analyze a longitudinal dataset from Hiroshima University’s Household Behavior and Finance Survey, which collected demographic, socioeconomic, and psychological characteristics of Japanese adults in 2020, 2021, and 2022, thus reflecting the COVID-19 pandemic timeline. The results show that approximately 50% of those surveyed experienced long-term loneliness, while about 6.5% developed loneliness during the pandemic. Although our weighted logit regression models showed few differences in loneliness during the pandemic between urban and rural areas, socioeconomic changes, such as beginning to live alone, leaving full-time employment, and decreased financial satisfaction, were identified as high-risk factors for loneliness, and their impact varied between rural and urban areas. Our results reflect that rural–urban differences have an effect on people’s loneliness during a pandemic but need to be considered together with socioeconomic changes. This knowledge can aid governments and healthcare providers in identifying those most at risk of loneliness within urban–rural regional boundaries.

The COVID-19 pandemic has caused a recession in the global economy. Many households have been experiencing financial difficulties. In order to curb its ripple effects 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. We utilized Hiroshima University’s Household Behavioral and Financial Survey in 2020 and 2021, and found that only 20% of the observations were satisfied with the one-time payment they received. We performed probit regression and 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. Our 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.

Lack of exercise, which increases the risk of many serious physical and mental illness, has been a common health issue in Japan. Recent studies confirm that financial literacy discourages irrational behavior like gambling and smoking. We therefore investigate how financial literacy, as a rational decision-making instrument, relates to peoples’ exercise behavior in Japan. We hypothesize that financial literacy encourages people to exercise regularly. Using Osaka University’s Preference Parameters Study (PPS) for 2010, we categorized respondents into two groups: those who exercise regularly or at least once a week and those who do not. Our probit estimation results show that financial literacy is positively related with exercise behavior, meaning that financially literate people are more likely to exercise regularly. As the COVID-19 health pandemic seems to exacerbate peoples’ physical inactivity, the results of our study show an alternative approach to encourage exercise. We therefore recommend that governments implement a financial literacy improvement policy to alleviate the lack of exercise.

Lack of investment in financial markets is one of the enduring puzzles in empirical finance. Although recent studies ascribe the lack of investment in stocks to financial literacy, the association between financial literacy and investment in financial markets remains inconclusive. We examine whether financial literacy is associated with investment in financial markets in the United States. We use investment in stocks, futures/options, investment trusts, corporate bonds, foreign currency deposits, and government bonds of foreign currency as a proxy for investment in financial markets. Using data from the Preference Parameter Study, a nationwide panel survey conducted by Osaka University of Japan, we provide evidence that financial literacy has a significantly positive association with investment in financial markets even after controlling for demographic, socioeconomic, and psychological factors. We check the robustness of our results by using an alternative proxy for investment in financial markets. Our study has far-reaching policy implications and we conclude by suggesting the introduction of financial literacy programs into the academic curriculum. Improving financial literacy could positively impact the mobilization of household funds and contribute to capital formation.

Although household savings in Japan are among the highest in the world, investment in risky assets is still very low. This study examines whether financial literacy explains the lack of investment in risky assets in Japan. We use data from the Preference Parameter Study, a nationwide survey in Japan that has been conducted by Osaka University. We use investment in stocks, investment trusts, futures/options, Japanese government bonds, government bonds of foreign countries, and foreign currency deposits as a proxy for investment in risky assets. Our results show that investment in risky assets is higher among financially literate people. Moreover, financial literacy has a significantly positive association with investment in risky assets even after controlling the demographic, socio-economic, and psychological factors. We check the robustness of the association between financial literacy and investment in risky assets by segregating investment in risky assets into investment in equity securities and investment in bonds and foreign currencies. Financial literacy is found to be associated with both investment in equity securities and investment in bonds and foreign currencies. Our results are also robust in terms of the endogeneity issue. The results imply that investment in risky assets in financial markets could be increased by introducing financial literacy programs at a mass level.

Alcohol consumption is an important public health issue in Japan due to its association with numerous side effects. Recent studies find that financial literacy helps people abstain from risky health behaviors such as smoking, lack of exercise, and gambling. This study investigates how financial literacy, as a rational decision-making instrument, is associated with alcohol consumption behavior in Japan. Using data from the Preference Parameter Study (PPS) of Osaka University, we categorize respondents into daily drinkers and non-daily drinkers. We find that financial literacy is not significantly associated with alcohol consumption among Japanese people. We argue that the prevailing social belief that alcohol consumption is not entirely negative from the health perspective and can be beneficial for socialization to some extent overrides people’s rationality and plays a significant role in alcohol consumption decisions. However, our study provides evidence that respondents who are males, middle-aged, have children, have higher household income, have smoking habits, and place more importance on the future are more likely to be daily drinkers. We argue that the availability and easy access to alcohol drinking opportunities likely make people irrational and tempts them to drink frequently. Thus, authorities might consider revising current policies regarding alcohol availability and accessibility to limit alcohol consumption.