The doorskin case concerned vertical integration in the market for interior molded doors. Doorskins are decorative plates for the front and the back of doors. Until 2012, three doorskin manufacturers operated in the United States. They were owned by door manufacturers that vertically integrated door and doorskin manufacturing. Other door manufacturers bought doorskins from these three companies. In 2012, one of the vertically integrated companies acquired the doorskin business of one of its vertically integrated peers. With the consolidation in the doorskin segment, prices of doorskins went up.
Ice Cream Shop’s ownership of equity in Big Restaurant gives the Shop control of the Restaurant, although possibly incomplete control (“partial integration”). By contrast, the Shop has complete control of the Ice Cream Van (“complete integration”). Big Firm’s minority holding in the Restaurant might amount to partial integration.
Jim sold 20% of his restaurant to Big Restaurant and has retained all governance rights.