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Birthday data!

Someone asked us for the birthday data, and Aki replied:

We used 1969-1989 also in BDA3
And there we mention that the birthday data come from the National Vital Statistics System natality data and are at, provided by Robert Kern using Google BigQuery.

The code for the BDA3 example is at (with link to data, too)

We have also a more recent paper using the data with R and Stan code available at and the copy of the data is in the same repo at

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