The well-known problem of too many instruments in dynamic panel data GMM is dealt with in detail in Roodman (2009, Oxford Bull. Econ. Statist.). The present paper goes one step further by providing a solution to this problem: factorisation of the standard instrument set is shown to be a valid...

Consumer price inflation, as measured by the year-on-year increase in the Harmonised Index of Consumer Prices (HICP), is used by the European Central Bank (ECB) for assessing its monetary policy. The European Statistical System regularly introduces methodological improvements into this...

Seasonally adjusted gross domestic product (GDP) data are inevitably surrounded by uncertainty. Disregarding methodological improvements, two main sources of revisions can be distinguished: First, revisions that reflect the incorporation of more comprehensive or more representative, but...

The present paper refers to the ESS Guidelines on Seasonal Adjustment and gives an example of how to use them in times of crisis. Taking as a basis the example of Argentine currency in circulation, a comparison is made between revisions from readjusting data every time a new figure is released...