The sources that I use for data are shown in the charts and tables, but readers may wish to understand a little more about them and why one source is used rather than another on different occasions.
Many of the sources are shown as being “via Ecowin”. This is a data service to which I subscribe and from which I have downloaded much of the data used. Ecowin draws its data from a wide variety of sources and its service covers a large number of countries and contains the main data series published in the national accounts of the individual countries. This usually means that the detailed source is less precisely specified than when I download the data from the websites of the national sources. For example, the UK national data are published by the Office for National Statistics (ONS) in a variety of publications, such as the Blue Book (BB). As these data are often included in more than one publication, they are identified by a series of four letters (e.g. YBHA); these are known to the ONS as “signifiers”, and I include these whenever possible.
My key source of long-term data for the UK is from National Income Expenditure and Output of the United Kingdom: 1855–1965 by C. H. Feinstein, published by Cambridge University Press in 1972.
Most recent UK economic data come from either the ONS or the Bank of England. In Japan and the US the data sources are more varied.
In Japan the national accounts are published by the Cabinet Office, which has a website ...