Dr. Carter McNamara, MBA, Ph.D., wrote extensively about ethics in the business world. One of the key points he developed was that ethics is not just for philosophers and theologians. He brought forth that ethics must be managed in the business world, since a lack of it can lead to the eventual downfall of the organization. Entire volumes have been written on the subject of ethics. It's a good topic to write about, since a great deal of scholarly peer-reviewed works are available as reference sources.
Electronic communication has made the world an easier place to do business. For a small business, international trade may be an option for selling goods. However, this has its own unique concerns. International trade for small businesses is an emerging field, and a host of good reference material is available. The My Own Business Organization provides a lot of tips for a small-business owner considering international trade.
The economics of a country, region, or even locality affects business. This topic has been extensively researched, and many reference sources are available. For example, you may want to write how NAFTA has affected particular industries and areas, or how a plant closing affects a town or region.
The field of taxation as it relates to business has thousands of sub-topics. The Internal Revenue Service offers much information in this area. Tax laws change year to year. One possible topic to explore would be how a change affects a business.
A non-profit organization does not mean non-revenue. Many large non-profits have operating budgets in the millions of dollars. The Morton Plant Mease hospital chain has over 6,900 associates working in 4 large hospitals. A large non-profit is run exactly like a business, except that revenue is directed to support the mission statement. It would be interesting to compare and contrast a large non-profit to a for-profit corporation. For example, a comparison of accounting methods and operations could be delved into.