I’ve been looking around the Jamendo site that I mentioned in my previous post. It’s a website that facilitates musicians to sell their music by donation, as Radiohead have recently done with much publicity. As well as finding a lot of cool music, I found that they publish the data on the donations that people have made to musicians on the site. Naturally, as a nerdy economist, I was much more excited by the presence of this data than the music itself.

With a little Excel trickery I cleaned up the data and did some basic analysis. The donations through the site are made to artists, and are not necessarily linked to specific albums or songs. On the page with the donations data, the name of the musician or group that each donation was made to is given. However, a few quick searches revealed that almost all musicians received very few donations. Because of this observation and since it would have been a lot more work, I didn’t attempt to cross-tabulate the donations with artists. I just analysed total donations per month. These can be made in US dollars or euro. I converted all euro donations to US dollars using the average euro/USD exchange rate for each month. I used the data from January 2006 to October 2007.

First some high-level statistics: Total donations were small. Jamendo currently claims about 69,000 songs are available for download (some other statistics are available on this page). Over the 22 months there were 1,454 donations made, for a total value of US$21,150. So each artist is receiving very little money, if anything. Here’s the number and value of donations each month:

count.png

Looking at the raw data, people generally make donations of round numbers, mostly multiples of 5 dollars or 5 euros. There were a few odd donations though, like 5.99 or 6.49. The largest donation was about $204. The smallest was $5, which is the default minimum donation that the website suggests. Across all donations the average was $14.55. This graph shows the average and standard deviation of monthly donations across time:

mean1.png

There’s a slight trend upwards over time in the average monthly donation, but a linear trend is not statistically significant. As you might expect, the distribution of donations (across all months) is skewed. Most donations cluster around relatively low values, but there are a number of higher donations. There were 12 donations of $100 or more. Here’s the histogram of all donations:

hist.png

Finally, the raw data is reported in US dollars and euro by donation, so assuming that Americans would choose to donate in US dollars and Europeans would donate in euros, we can test whether there’s a significant difference in altruism between these two groups. One thing that might bias this result is that Jamendo appears to be a Europe-based website, and many of the artists are European. There were also no US dollar donations before December 2006 (I don’t know the reason for that). And there are many fewer US dollar donations than euro donations (167 versus 1287). With these things in mind, the average for donations originally made in US dollars is $10.70, while the average for donations originally made in euro is $15.04. This difference is highly statistically significant. So it would seem that Europeans are more altruistic than Americans (at least towards the artists on this website).

Click here to download my Excel file of the data, if you are interested.

by aaron. Permalink. Comments RSS.