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Assessing accurately global economic conditions is a great challenge for economists. The International Monetary Fund proposes within its periodic World Economic Outlook report a measure of the global GDP annual growth, that is generally considered as the benchmark nowcast by macroeconomists. In this paper, we put forward an alternative approach to provide monthly nowcasts of the annual global growth rate. Our approach builds on a Factor‐Augmented MIxed DAta Sampling (FA‐MIDAS) model that enables: (i) to account for a large monthly database including various countries and sectors of the global economy and (ii) to nowcast a low‐frequency macroeconomic variable using higher frequency information. Pseudo‐real‐time results over the period 2010–16 show that this approach provides reliable and timely nowcasts of the world GDP annual growth on a monthly basis. [ABSTRACT FROM AUTHOR]

The article discusses the need for well-based information about the comparative size of different national economies to understand the events and relationships in the world economy. It mentions the derivation from systematic cross-country comparisons of the prices of the goods and services that enter into gross domestic product (GDP). The concept of a country's systemic relevance in the global economy is also tackled.