Definition: Mixed methods
Regional accounts and indicators
The bottom-up methods is rarely encountered in its pure form. There are always gaps in the data, which have to be filled using a top-down approach. Similarly many top-down methods often include data from comprehensive sources in the same way as bottom-up estimates. Thus mixed methods are the norm.
Eurostat, "Regional accounts methods - Gross value-added and gross fixed capital formation by activity", Office for Official Publications of the European Communities, Luxembourg, 1995, p.14