A study by Wageningen University & Research for the Producers' Organisation for Consumer Potatoes (POC) in the Netherlands, Belgium, Germany, and France, has found that reducing the supply of French fry potatoes in these countries may not necessarily lead to a higher grower's price due to substitution from other sources. The research, titled 'Potato market in balance', suggests that a five percent supply reduction in the Netherlands could result in a only 0.5% price increase, and a five percent reduction in the EU4 could increase the price by 3.6%. However, in most cases, there would still be a net loss of turnover. The POC is exploring the possibility of private production control to prevent price drops in times of overproduction.