Is monetary tightening pushing the world economy into recession? That is the key question faced by investors and central bankers in the current situation. Unfortunately, the lack of timely data makes it difficult to judge the level of economic activity at any point in time. For instance, real GDP data are typically only available quarterly, with the first estimates published a month or more after the end of the quarter.
Analysts therefore often rely on survey-based indicators such as Purchasing Managers’ Indices (PMIs). However, the ability of such indicators to capture the state of economic activity can become inaccurate when large economic shocks occur that have sharp and pronounced impacts on economic activity. There is therefore a need to cross-check with other indicators.
Recently the OECD has proposed a Weekly Tracker that provides real-time estimates of GDP growth in 46 economies.1 The tracker uses Google Trends data to estimate the year-on-year growth rate in weekly GDP with a very short delay. It aggregates together information about search behaviour related to consumption, labour markets, housing, industrial activity and uncertainty.2
To see the usefulness of the tracker, the figure below shows weekly estimates since early 2019 of real GDP growth in the eurozone over four quarters as indicated by the tracker. It also shows the growth rate computed from data on real GDP growth. In interpreting the figure, it should be kept in mind that these data are also estimates.
The figure shows that the tracker appears to lead the real GDP data by a few weeks. However, the two series are very strongly correlated. Computing the correlation between quarterly averages of the weekly data of the tracker and quarterly data on real GDP growth leads to a correlation coefficient of 0.99. (See scatter plot in the appendix.) This suggests that the weekly tracker is informative about real GDP growth.