[sgbuffett]

A chicken farmer produces 100 chickens in a village.
The demand for the village is only 50 at price is selling. He sells 50 in his own village and 50 to neighboring village. Win win win everyone gets their chicken farmer get to make some money and life is great.

One day there is chicken feed shortage farmer cost double and he has to double the price of his chicken. No choice. Villagers not happy. So populist village chief step in to impose price cap. Now farmer can only sell at old price cannot increase price. Farmer going to lose money and his one year effort to breed chicken not properly compensated. He decided to sell more chicken to neighboring village 80 instead of 50 because he could get higher price. Now the village only has 20 chickens resulting in shortage.

Village chief got angry at the farmers accusing them of being greedy. He bans them from exporting the chickens to neighboring village forcing them to sell all chickens at the home village.

But the normal demand at home is only 50 chickens so to clear all their chickens farmers  have to slash prices and lose money. The farmers hurt by losses decided to leave the industry and do pig farming instead and chicken production falls.

The following year only 25 chickens were produced and the demand was 50. The village chief now has to fix price and ration the chicken or allow the price to rocket so that chicken becomes expensive and demand falls to the supply.

Problem with price controls and export restrictions is they don't address the root cause and causes long term problems. You may fix the problem for a few months but it comes back as a bigger problem.