Complex sentence: Credit rationing is not the same phenomenon as the better-known case of food rationing, common in times of war, when shortages lead governments to control the food portions allocated to individuals, who would be willing to pay higher prices for more portions.
Split into simpler sentences: Credit rationing is not the same phenomenon as the better-known case of food rationing, common in times of war. In that case, shortages lead governments to control the food portions allocated to individuals, who would be willing to pay higher prices for more portions.