Before The Eulogy

The music industry says it repeatedly, with passion and conviction: downloading hurts sales.

That statement is at the heart of the war on file sharing, both of music and movies, and underpins lawsuits against thousands of music fans, as well as legislation approved last week by a House Judiciary subcommittee that would create federal penalties for using what is known as peer-to-peer technology to download copyrighted works. It is also part of the reason that the Justice Department introduced an intellectual-property task force last week that plans to step up criminal prosecutions of copyright infringers.

But what if the industry is wrong, and file sharing is not hurting record sales?

It might seem counterintuitive, but that is the conclusion reached by two economists who released a draft last week of the first study that makes a rigorous economic comparison of directly observed activity on file-sharing networks and music buying.

"Downloads have an effect on sales which is statistically indistinguishable from zero, despite rather precise estimates," write its authors, Felix Oberholzer-Gee of the Harvard Business School and Koleman S. Strumpf of the University of North Carolina at Chapel Hill.

The industry has reacted with the kind of flustered consternation that the White House might display if Richard A. Clarke showed up at a Rose Garden tea party. Last week, the Recording Industry Association of America sent out three versions of a six-page response to the study.

The problem with the industry view, Professors Oberholzer-Gee and Strumpf say, is that it is not supported by solid evidence. Previous studies have failed because they tend to depend on surveys, and the authors contend that surveys of illegal activity are not trustworthy. "Those who agree to have their Internet behavior discussed or monitored are unlikely to be representative of all Internet users," the authors wrote.

Instead, they analyzed the direct data of music downloaders over a 17-week period in the fall of 2002, and compared that activity with actual music purchases during that time. Using complex mathematical formulas, they determined that spikes in downloading had almost no discernible effect on sales. Even under their worst-case example, "it would take 5,000 downloads to reduce the sales of an album by one copy," they wrote. "After annualizing, this would imply a yearly sales loss of two million albums, which is virtually rounding error" given that 803 million records were sold in 2002. Sales dropped by 139 million albums from 2000 to 2002.

"While downloads occur on a vast scale, most users are likely individuals who would not have bought the album even in the absence of file sharing," the professors wrote.

In an interview, Professor Oberholzer-Gee said that previous research assumed that every download could be thought of as a lost sale. In fact, he said, most downloaders were drawn to free music and were unlikely to spend $18 on a CD.

"Say I offer you a free flight to Florida," he asks. "How likely is it that you will go to Florida? It is very likely, because the price is free." If there were no free ticket, that trip to Florida would be much less likely, he said. Similarly, free music might draw all kinds of people, but "it doesn't mean that these people would buy CD's at $18," he said.

The most popular albums bought are also the most popular downloads, so the researchers looked for anomalous rises in downloading activity that they might compare to sales activity. They found one such spike, Professor Oberholzer-Gee said, during a German school holiday that occurred during the time they studied. Germany is second to the United States in making files available for downloading, supplying about 15 percent of online music files, he said. During the vacation, students who were home with time on their hands flooded the Internet with new files, which in turn spurred new downloading activity. The researchers then looked for any possible impact in the subsequent weeks on sales of CD's.

Professor Oberholzer said that he had expected to find that downloading resulted in some harm to the industry, and was startled when he first ran the numbers in the spring of 2003. "I called Koleman and said, 'Something is not quite right - there seems to be no effect between file sharing and sales.' "

Amy Weiss, an industry spokeswoman, expressed incredulity at what she deemed an "incomprehensible" study, and she ridiculed the notion that a relatively small sample of downloads could shed light on the universe of activity.

The industry response, titled "Downloading Hurts Sales," concludes: "If file sharing

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