Polls, enrollment statistics, social media posts and education economists agree: We are seeing a growing skepticism of college among many American teenagers and their parents.

Whether that is a short-term trend spurred by a strong job market with plentiful opportunities or a longer-term change will be important for the future of the work force. It could also shape economic mobility, inequality and other facets of the economy in the years ahead.

That is why we want to hear from people who have…