The limitations of balance of payments data have been partially addressed through the publication of more detailed sectoral data. Although take-up is patchy, more countries now release information on the sectoral distribution of cross-border flows and positions.
See "Leitlinien und Empfehlungen des Vereins für Socialpolitik für Ex post-Wirkungsanalysen" as of 6 September, 2015 ( https://www.socialpolitik.de/docs/VfS-Leitlinien_Ex_postWirkungsanalysen.pdf) and Michael Burda, Monika Schnitzer, Bernd Fitzenberger, and Christoph Schmidt (2014), Evidenzbasierte Wirtschaftspolitik, Thesenpapier zur Kerntagung des Vereins für Socialpolitik in Hamburg 2014;  https://www.socialpolitik.de/En/guidelines-evidence-based-policy. 6.