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The period between the two World Wars—the 1920s and 1930s—is often called the Golden Age of Mystery Novels. Authors such as Agatha Christie and Dorothy Sayers in the United Kingdom, and Ellery Queen (pen name of cousins Frederic Dannay and Manfred B. Lee) and Mary Roberts Rinehart in the United States, topped the bestseller lists and are still read today.
One of the attractions of mystery stories from this period is the, often accidental, insights they give into life during those times. Some customs differ sharply from those of today. For instance, absolutely everyone—man or woman—both smokes and drinks alcohol. Racial attitudes were far from enlightened. For a particularly shocking example, search online for the original title of the Agatha Christie novel now published as And Then There Were None. Attitudes toward women were at least somewhat less problematic in part because some of the most widely read mystery writers were women.
But in some respects, the attitudes of characters in these novels could be surprisingly contemporary. British writer Freeman Wills Crofts wrote a series of mysteries featuring the Scotland Yard Chief Inspector Joseph French. The following appears in Crofts’s novel Fatal Venture, first published in 1939:
“Generally speaking, the deceased was not popular. … He was also a keen and successful businessman, and, as the Chief Inspector knew, one man’s gain meant another man’s loss and there must have been many financial casualties who had no cause to love him.”
As a side note, if you had to be a character in a Golden Age mystery, you absolutely didn’t want to be an unpleasant, older, wealthy man. The half-life of such characters was generally measured in hours. In this case, John Stott—the person Inspector French is referring to—is the wealthy victim whose murder French has to solve.

Image of the novel from Amazon.com
Inspector French’s view that “one man’s gain meant another man’s loss” echoes recent arguments that rich businesspeople don’t deserve the wealth their success brings. This view runs counter to the fundamental economic idea that if a transaction is freely entered into, the transaction must benefit both parties. Otherwise, why would the party who is made worse off have agreed to the transaction?
Even in the case where there is an imbalance in economic power—for instance, when a consumer is buying a product from a monopolist—the purchase must have made the buyer better off, or he or she wouldn’t have made it. In this case, though, we can argue that, by forming monopolies, sellers make themselves better off at the expense of consumers. In the United States, the antitrust laws are intended to deal with that situation by making illegal mergers and other business practices that make consumers worse off.
In general, though, entrepreneurs, by starting new businesses or introducing new products, make consumers better off even if the entrepreneurs become very wealthy. In a famous academic paper, Nobel laureate William Nordhaus of Yale University, estimated the “fraction of the benefits from new technologies that have been captured by innovators … as compared to the fraction that have been passed on in lower prices.” He found that innovators captured only 2.2 percent of the social returns to innovation. The remainder of the returns represent consumer surplus. (We discuss the role of entrepreneurs in a market system in Microeconomics, Chapter 2, Section 2.3. We discuss the concept of consumer surplus in Chapter 4.)
In an opinion column on bloomberg.com, Michael Strain of the American Enterprise Institute noted that “a back-of-the-envelope calculation [applying] Nordhaus’s result to Bezos suggests he has created $5.4 trillion in value for the rest of society.” As Strain’s reference to this calculation as being “back-of-the-envelope” indicates, it’s not clear that Nordhaus’s analysis, which is based on data for the U.S. nonfarm business sector, can be applied to the contribution of a single entrepreneur like Bezos. But most economists would agree with the general point that entrepreneurs generate benefits to consumers that are far greater than the return the entrepreneurs receive for their contributions—even if the entrepreneurs end up earning billions.
Inspector French solved the mystery of John Stott’s murder, proving himself to have been an excellent detective even if he wasn’t a very good economist.



































































































































































































































