Visualizing GDP: An Inside Look At The Q3 Advance Estimate – October 2018

Note: The charts in this commentary have been updated to include the Q3 2018 Advance Estimate released Friday morning.

The chart below is a way to visualize real GDP change since 2007. It uses a stacked column chart to segment the four major components of GDP with a dashed line overlay to show the sum of the four, which is real GDP itself. Here is the latest overview from the Bureau of Labor Statistics:

Real gross domestic product (GDP) increased at an annual rate of 3.5 percent in the third quarter of 2018 (table 1), according to the “advance” estimate released by the Bureau of Economic Analysis. In the second quarter, real GDP increased 4.2 percent.

The Bureau emphasized that the third-quarter advance estimate released today is based on source data that are incomplete or subject to further revision by the source agency (see “Source Data for the Advance Estimate” on page 2). The “second” estimate for the third quarter, based on more complete data, will be released on November 28, 2018. [more here]

Let’s take a closer look at the contributions of GDP of the four major subcomponents. The data source for this chart is the Excel file accompanying the BEA’s latest GDP news release (see the links in the right column). Specifically, it uses Table 2: Contributions to Percent Change in Real Gross Domestic Product.

Note: The conventional practice is to round GDP to one decimal place, the latest at 3.5%. The GDP in the chart above is the real GDP calculated to two decimal places.

Here is a chart of the latest estimates.

Over the time frame of this chart, the Personal Consumption Expenditures (PCE) component has shown the most consistent correlation with real GDP itself. When PCE has been positive, GDP has usually been positive, and vice versa. In the latest GDP data, the contribution of PCE came at 2.69 of the 3.50 real GDP, up from the previous revision and still a positive contribution to Q3 GDP.