This isn't a study, this is two guys (one is an anthropologist) that wrote an article about their opinion. I'll admit that capitalism is flawed, but what isn't? There are four types of economic systems. IMO Capitalism is the least flawed system.
Economic System Types
Traditional
A traditional economic system is one in which each new generation retains the economic position of its parents and grandparents. Tradition decides what an individual does for his living, so industry, clothing and shelter are the same as in previous generations.
Market
Market economies are based on consumers and their buying decisions rather than under government control. Government’s role is to create a stable economy for the market to operate properly.
Command
In a command economy, the government controls all economic activity. The market plays little to no role in production decisions. Command economies are less flexible than market economies and react slower to changes in consumer purchasing patterns and fluctuations in supply and demand.
Mixed
A mixed economy combines qualities of market and command systems into one. Theoretically, this system should be able to combine the best policies of both systems, but in practice the proportion government controls and response to market forces varies. Some countries rely more on market emphasis and others on state planning.