COVID-19 pandemic and firm performance in leisure, arts, and hospitality industries: international evidence

The stock market represents complex systems where multiple agents interact. The complexity of the environment in the financial markets in general has encouraged the use of modeling by multi-agent platforms and particularly in the case of the stock market.
In this paper, an agent-based simulation model is proposed to study the behavior of the volume of market transactions. The model is based on the case of a single asset and three types of investor agents. Each investor can be a zero intelligent trader, fundamentalist trader or traders using historical information in the decision making process. The goal of the study is to simulate the behavior of a stock market according to the different considered endogenous and exogenous variables.

Researchers have emphasized the role of e-commerce for small enterprises in improving their performance. However, there is limited evidence on the use of e-commerce by small enterprises, and e-commerce adopters and non-adopters dealing with COVID-19. Therefore, the purpose of this study is to investigate the differences in the impact of COVID-19 on income between small enterprises that are adopters and non-adopters of e-commerce. This study also explored the impact of restrictions on community activities, the intention to adopt e-commerce, and the types of assistance required by small enterprises due to the pandemic. Data were collected through an online questionnaire survey among small enterprises that operate in the culinary field (1,024 small enterprises in Indonesia). The data were analyzed using descriptive analysis, cross-tabulation, and the Mann-Whitney test. This study finds that non-adoption of e-commerce caused small enterprises to experience a decline in income, which worsened due to restrictions of community activities, compared to adopters of e-commerce. Therefore, to overcome this negativity, small enterprises were pushed to adopt e-commerce. Finally, working capital assistance is the main assistance required due to the pandemic both by e-commerce adopters and non-adopters. This study has significant implications for how small enterprises and governments may benefit from e-commerce dealing with extreme disruptions such as the COVID-19 pandemic.

Acknowledgment
We are grateful to Mulawarman University for providing us with the funding necessary to gather the necessary data for the study and complete this empirical investigation. We also would like to thank two anonymous reviewers and seminar participants at Mulawarman University for their helpful feedback.

This study aims to observe the long run and short run effects of gross domestic product, foreign direct investment inflows and trade on CO₂ emissions and causality relationships between these factors, using annual data for the period of 1974-2010. The empirical results demonstrate that the inverted U-shaped relationship of environmental Kuznets curve is valid for Turkey. In addition, there are positive long run effects of foreign direct investment and trade openness on CO₂ emissions. The authors also find a bidirectional causality relationship between CO₂ emission and FDI.