Based on your request for a research topic related to sustainability and business, here is a suggestion:

Topic: The Impact of Sustainability Reporting on Investor Decision Making

Research Gap: While there has been an increase in sustainability reporting among businesses in recent years, it is uncertain if sustainability reporting affects investor decision-making. While some studies suggest that sustainability reporting can lead to better long-term financial performance, other studies suggest that investors do not take sustainability reporting into account when making investment decisions. This research could evaluate the impact of sustainability reporting on investor decision-making and consider the factors that contribute to or detract from the effectiveness of sustainability reporting in influencing investor behavior.

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"The Business Case for Sustainability: Examining the Economic Benefits and Challenges of Adopting Sustainable Practices"