Q4 2015 US GDP Estimate: +2.0% 23 November 2015
James Picerno | Nov 23, 2015 08:04AM ET
The US economy is on track for a modest rebound in the fourth quarter, according to GDP projections from several sources. Although it’s still early for developing robust estimates for Q4, most economists are looking for improvement over Q3’s tepid 1.5% rise in GDP (seasonally adjusted annual rate).
The Capital Spectator’s average estimate via several econometric forecasts currently anticipates a 2.0% advance for the government’s preliminary Q4 report that’s scheduled for release at the end of January. The prediction is near the low end of projections from other sources.
Among the higher estimates for Q4 at the moment is BMO Capital’s outlook for a 2.9% rise, which is close to a doubling of Q3’s pace. Meantime, the widely followed GDPNow model via the Atlanta Fed is looking for a 2.3% increase in GDP for this year’s final quarter (as of the Nov. 18 projection).
As for tomorrow’s revised data for Q3 GDP (due for release on Nov 24), analysts think the government will boost the growth rate to 2.1% from the previously reported 1.5% estimate, based on Econoday.com’s consensus forecast.
As for the Q4 outlook, here’s a summary of estimates from various sources:
Here are the various forecasts that are used to calculate CapitalSpectator.com’s average estimate:
As updated estimates are published, based on incoming economic data, the chart below tracks the changes in the evolution of The Capital Spectator’s projections.
Finally, here’s a brief profile for each of The Capital Spectator’s GDP forecast methodologies:
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R-4: This estimate is based on a R of historical GDP data vs. quarterly changes for four key economic indicators: real personal consumption expenditures (or real retail sales for the current month until the PCE report is published), real personal income less government transfers, industrial production, and private non-farm payrolls. The model estimates the statistical relationships from the early 1970s to the present. The estimates are revised as new data is published.
R-10: This model also uses a multiple regression framework based on numbers dating to the early 1970s and updates the estimates as new data arrives. The methodology is identical to the 4-factor model above, except that R-10 uses additional factors—10 in all—to forecast GDP. In addition to the data quartet in the 4-factor model, the 10-factor forecast also incorporates the following six series: ISM Manufacturing PMI Composite Index, housing starts, initial jobless claims, the stock market (Wilshire 5000), crude oil prices (spot price for West Texas Intermediate), and the Treasury yield curve spread (10-Year Note less 3-Month T-bill).
ARIMA GDP: The econometric engine for this forecast is known as an “forecast” package, which optimizes the parameters based on the data set’s historical record.
ARIMA R-4: This model combines ARIMA estimates with regression analysis to project GDP data. The ARIMA R-4 model analyzes four historical data sets: real personal consumption expenditures, real personal income less government transfers, industrial production, and private non-farm payrolls. This model uses the historical relationships between those indicators and GDP for projections by filling in the missing data points in the current quarter with ARIMA estimates. As the indicators are updated, actual data replaces the ARIMA estimates and the forecast is recalculated.
VAR 4: This vector autoregression model uses four data series in search of interdependent relationships for estimating GDP. The historical data sets in the R-4 and ARIMA R-4 models noted above are also used in VAR-4, albeit with a different econometric engine. As new data is published, so too is the VAR-4 forecast. The data sets range from the early 1970s to the present, using the “vars” package in R to crunch the numbers.
ARIMA R-NIPA: The model uses an autoregressive integrated moving average to estimate future values of GDP based on the datasets of four primary categories of the national income and product accounts (NIPA): personal consumption expenditures, gross private domestic investment, net exports of goods and services, and government consumption expenditures and gross investment. The model uses historical data from the early 1970s to the present for anticipating the target quarter’s change. As the historical numbers are revised, so too is the estimate, which is calculated in R via the “forecast” package, which optimizes the parameters based on the data set’s historical record.
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