The gender characteristics of initial wage levels in the labour market were investigated using data from the China Family Panel Studies (CFPS), and gender differences in the individual retirement accounts wealth of urban employees were studied on this basis. The results indicate that for female employees, the individual retirement accounts wealth they obtained through longer life expectancy is largely offset by their low level of income and short contribution period, and the net pension wealth of female employees who retire at statutory retirement age is even lower than that of male employees. Due to the inheritability of account balances, extending the retirement age will increase the individual retirement account net pension wealth of all employees, and each year of extension will bring more net pension wealth increase to male employees.

This study examines the impact of the Russia-Ukraine conflict, which began on February 24, 2022, on natural gas prices and supply security in major global markets. Six months after the conflict's onset, natural gas prices surged by an average of 78.65% across international markets. Notably, prices in the European Union, Russia, the United Kingdom, Japan, and South Korea saw substantial increases, while price hikes in China, the United States, and Australia were comparatively smaller. Despite these price fluctuations, the security of natural gas supply in key international markets remained largely unaffected. Using the Differences-in-Differences (DID) method, the study analyzed the conflict's impact on supply security, employing a mediation effects model to examine the roles of supply, demand, and price. The findings reveal that the conflict significantly reduced natural gas supply security, with negative effects on both supply and demand, although price changes did not mediate this reduction in supply security. Furthermore, the regional impact on supply security was minimal, likely due to the high integration of the global natural gas market. Overall, the Russia-Ukraine conflict notably influenced natural gas supply security by affecting supply and demand factors.

Forty-five UK universities were approached, drawn from 21 universities whose client technology/knowledge-transfer firms perform consistently well (category 1 universities), and 24 universities whose client technology/knowledge-transfer firms perform consistently poorly (category 2). Contact was established with staff in the Technology Transfer Office (TTO) or similar department, resulting in 72 persons identified as either “leading” TTO staff or “operational” TTO staff. These individuals were subject to semi-structured interviews around a 10-point questionnaire to arrive at consensus opinions. Results indicate that independently of whether the university is regarded as “entrepreneurial” or not, the TTOs of category 1 universities are more ambidextrous than those of category 2 universities.

The fast-paced evolution of the business world today requires business players to work diligently to maintain their competitive advantage. To enhance a company's competitive edge, strategic business planning is essential. A well-developed business strategy allows a company to achieve the best market position, improve sales performance, and define approaches to gain a competitive advantage. CV Cita Nasional, a company located in Indonesia that manufactures a pasteurized milk, faces business strategy issues, including declining revenue. This study aims to analyze the internal factors using value chain analysis and external factors using PESTEL Analysis, followed by the formulation of business strategies through SWOT Analysis, and the establishment of strategic priorities using QSPM. Data for this research were collected through interviews and questionnaires, with participation from stakeholders including the plan manager, production and quality control managers, administrative and personnel manager, finance and treasury manager, production and quality control supervisors, production process supervisor, and purchasing and warehouse supervisor. The internal factor analysis using value chain analysis revealed 29 strengths and 7 weaknesses, while the external factor analysis using PESTEL identified 11 opportunities and 8 threats. The strategy formulation using the SWOT matrix resulted in 7 alternative strategies, including 2 SO strategies, 2 WO strategies, 2 ST strategies, and 1 WT strategy. The QSPM method was used to prioritize strategies, with Strategy 1 ("Maintaining the stability of current product prices and improving product quality") achieving the highest value.

Recent research has demonstrated that many mean-variance and shortfall-based optimal portfolio selection fail to out-perform the Naive (1/n) Portfolio in out-of-sample testing. This paper revisits this line of inquiry by applying the Naive and Sharpe Portfolios to 1100 sector-specific S&P 500 re-sampled data sets from the 2007-2021 time frame. Using April 2020 as the baseline train-test split break point, the Naive Portfolio delivers statistically significantly superior Sharpe Ratios in the test data in ten of the eleven sectors. However, the Sharpe Portfolio delivers statistically significantly superior shortfall values in all eleven sectors in the test data. Using March 2020 and May 2020 as alternative breakpoints gave similar results to the baseline analysis. Interestingly, when the data set was truncated at February 2020 (i.e., before the Covid correction) the Sharpe Portfolio returned statistically significantly better Sharpe Ratios than the Naïve Portfolio in the test data in all but the Energy sector; as in the baseline analysis, the Sharpe Portfolio returned statistically significantly superior shortfall values for all eleven sectors. Thus, the Sharpe Portfolio can deliver acceptable out-of-sample performance, but the conditions for success appear to vary by sector and test data erraticism.

This paper investigates the effects of an unprecedented education policy called ‘double reduction’ (DR) on students’ performance, with evidence from China. One of the significant changes brought about by this policy is the transition of examination scores from a numerical system to a grading system. We found a junior middle school in a small town in Guangzhou that met the requirements for a natural experiment, and we used such unique data to examine three hypotheses. After the implementation of DR, the ‘rat race’ reflected on the students’ grade is reduced. To examine heterogeneity, we apply quantile regression showing that the high-ability students exert less efforts on the ‘rat race’ than low-ability students. Meanwhile, we also provide possible explanations in terms of this phenomenon. Overall, this study not only does it assess the grading transformation that DR policy induced but also fills the gap in the field of DR from an economic perspective.