摘要：The Economic Activity Indicator (EAI)1 is aimed at giving an overall picture of the current state of affairs in the Bulgarian economy as well as an account of its long-term and cyclical component. The indicator has been constructed based on a dynamic factor model and consists of eight variables, measuing change in both the internal and external environment.2 As GDP is another aggregate indicator of business activity, both EAI and GDP have reported more or less the same pattern of dynamics in most periods of survey. This, however, does not imply that change in both indicators was identical3 because in given periods it may have differed not only in magnitude but direction as well.
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