UC Berkeley

The authors regret: On page 4, line number 47 it now reads “Ninety-eight (38%)…”, but is should read “One hundred and one (38%)…”. On page 4, line 48–50 it now reads “Of the total 1,020 informants …. 367 from Norway, 208 from Finland, 102 from England, and 84 from the US.”, but it should read “Of the total 1,027 informants …. 370 from Norway, 209 from Finland, 103 from England, and 90 from the US.” On page 6, table 1, there is an error in the title of the columns. It now is in the following order “Finland – Norway – England – US”, but the titles should have the following order “Finland – England – Norway – US”.  The authors would like to apologise for any inconvenience caused.