Production Credit Ass'n v. Department of Treasury

*308Fitzgerald, J.

These cases arose out of disputes between the plaintiff taxpayers and the Michigan Department of Treasury concerning the relationship between Michigan’s now-repealed1 corporate income tax and the Federal income tax. The issue in Production Credit Ass’ns v Dep’t of Treasury (hereafter "Production Credit”) is whether Michigan’s Income Tax Act required a corporation to carry back its post-January 1, 1968 net operating losses to the same years as it had carried back such losses for Federal income tax purposes. The issues in Detroit Edison Co v Dep’t of Treasury (hereafter "Detroit…