Yes, there are several journals and publications that offer a platform for students to contribute to policy discussions in the field of commerce. Some examples include:

1. Journal of International Business Policy (JIBP): This journal focuses on policy-related research in the field of international business. It welcomes contributions from students and early career researchers.

2. International Journal of Commerce and Management (IJCM): This journal covers a wide range of topics in commerce and management, including policy-related issues. It encourages submissions from students and researchers.

3. Journal of Policy Modeling: While not specifically focused on commerce, this journal publishes research articles on a wide range of policy issues, including those related to commerce and economics. It welcomes contributions from students and scholars.

4. Harvard Business Review (HBR): Although HBR is not exclusively a platform for students, it occasionally publishes articles written by students or young professionals. It covers a wide range of topics in business, including policy-related discussions.

5. Journal of Public Policy and Marketing (JPP&M): This journal specifically focuses on the intersection of marketing and public policy. It provides a platform for students and researchers to contribute to policy discussions in the context of marketing and commerce.

These are just a few examples, and there may be other journals or publications that offer similar platforms for student contributions to policy discussions in the field of commerce. It is always recommended to review the specific guidelines and aims of a journal before submitting any work.