why can markets only provide private goods efficiently 
the free rider problem creates an opportunity for private goods all non excludable goods suffer from the free rider problem they become economically infeasible to produce creating a market for private goods the bottom lineeconomists define products as rival goods or non rival goods as a way to analyze patterns of consumption and the workings of the law of supply and demand a rival good is restricted in its availability which can cause demand to outstrip supply and its price to increase a non rival good is relatively unaffected by demand as it can be consumed by many people at the same time 