ECO 372 Week 1 Macroeconomics and Measuring GDP Example

Why GDP Fell in Early 2025 While Factories Stayed Busy: Measuring Output by Expenditure, Real Versus Nominal Growth and What an Import Surge Does to the Numbers

[Student Name]

University of Phoenix

ECO/372: Principles of Macroeconomics

Week 1 Assignment

[Instructor Name]

[Date]

Lakeview Precision Components is a composite written for a model paper; GDP figures and research findings come from the sources listed and are stated generally.

Lakeview Precision Components, a composite maker of steering and brake parts in Grand Rapids, Michigan, supplies three automakers and employs about 420 people. In late April 2025, its finance chief read that U.S. gross domestic product had fallen from January through March, the first decline in three years. Yet Lakeview's orders were steady and its plant ran two full shifts. Its bank asked whether the company planned to cut its forecast. Before changing a business plan because of a headline, a manager needs to understand what the number measures and why it moved. This paper explains GDP and the early 2025 decline.

What Macroeconomics Studies

Macroeconomics studies the economy as a whole: total output, employment, inflation, interest rates and growth. Where microeconomics asks why egg prices rose, macroeconomics asks why the overall price level or total output changed (Mankiw, 2021). For Lakeview, macroeconomic conditions set the demand for cars, the cost of borrowing and the wages it must pay.

Measuring GDP

Gross domestic product totals, at market prices, every final good and service made inside the country during a given period. The Bureau of Economic Analysis builds the estimate from several sources and checks it against income data (Landefeld et al., 2008); the most familiar adds up spending on final goods and services: consumption by households, investment by businesses in equipment, structures and inventories, government purchases of goods and services and net exports, exports minus imports. Only final goods count; Lakeview's brake calipers are included in the value of the cars they go into, not counted separately, to avoid double counting.

Why Imports Are Subtracted

Imports are subtracted not because buying abroad shrinks the economy, but because spending on imported goods is already included in consumption, investment and government purchases. A car imported from Japan and bought by a family in Michigan appears in consumption; subtracting it under imports removes production that took place outside the United States. Net exports therefore fall when imports rise, even if domestic production does not change.

The Early 2025 Decline

The first estimate showed real GDP falling at an annual rate of about 0.3 percent in the first quarter, later revised to roughly half a percent (Bureau of Economic Analysis, 2025). Consumer spending grew, though slowly. Business investment, especially in equipment, rose. But imports surged, as businesses rushed to buy foreign goods before new tariffs announced for the spring took effect. The jump in imports subtracted several percentage points from measured growth. Part of the imported goods went into inventories, which count as investment, offsetting part of the subtraction, but not all of it.

What the Decline Meant

Much of the first-quarter decline reflected timing: goods bought early from abroad rather than a collapse in domestic production. In the second quarter, imports fell back sharply, and measured growth rebounded to around 3 percent at an annual rate. For Lakeview, whose orders depend on domestic vehicle production and sales, the first-quarter figure said little about its own market, though tariffs on imported steel and parts would affect its costs, a topic for later weeks.

Annualized Rates

Quarterly GDP growth is reported at an annual rate, the rate that would result if the quarter's pace continued for a year. A decline of about 0.5 percent at an annual rate means output fell by roughly an eighth of a percent during the quarter. Reading the basis correctly prevents overreaction.

Real Versus Nominal GDP

Nominal GDP measures output at current prices, so it rises with inflation even if quantities do not change. Real GDP values output at prices from a base year, removing the effect of price changes. The GDP price index measures the overall change in prices between them. Growth figures in news reports are real; Lakeview's planners compare their own sales growth, which is nominal, against nominal GDP or subtract inflation before comparing with real growth.

GDP Per Person and the Business Cycle

Real GDP per person measures average living standards over time. Over decades, U.S. real GDP per person has grown about 2 percent a year on average. Around that trend, the economy moves through business cycles of expansion and contraction. A recession is a broad decline in activity lasting more than a few months, judged by a committee of economists using employment, income, production and sales, not a single quarter of GDP.

What GDP Leaves Out

GDP excludes unpaid work at home, such as child care, and much of the informal economy. It counts spending on cleanup after disasters as output while ignoring the losses. It does not measure leisure, pollution or how income is distributed. For a business, those omissions matter less than for public policy, but they are reminders that GDP measures market production, not well-being.

Income and Production Views

GDP can also be measured by adding up incomes earned in production, wages, profits, rents and interest, or by adding the value each industry adds to its inputs. In principle the three totals match; in practice they differ by a statistical discrepancy because they rely on different source data. In early 2025, the income-side measure showed little or no decline, another sign that the drop reflected the import surge rather than weaker domestic production. Comparing the measures is a useful habit when a headline looks out of line with other evidence.

Revisions

GDP estimates are revised as more complete data arrive. The first estimate of early 2025 changed by about two tenths of a point within two months, and annual revisions can change figures further. Planners should treat early estimates as provisional.

How Lakeview Should Read Future Releases

Lakeview's finance chief decided to watch the components most relevant to the company, consumer spending on motor vehicles, business investment and inventories, rather than the headline alone, and to compare its order book with light vehicle sales and production data. The company kept its forecast but added a scenario for tariff-related cost increases.

Conclusion

GDP fell in early 2025 mainly because businesses imported goods early to beat tariffs, and imports are subtracted to remove foreign production, not because domestic output collapsed. Understanding the expenditure components, real versus nominal measures, annualized rates and revisions lets a business read a headline for what it is and plan around the parts of the economy that matter to it.

References

Bureau of Economic Analysis. (2025). Gross domestic product, first quarter 2025 (third estimate), GDP by industry, and corporate profits (revised). U.S. Department of Commerce. https://www.bea.gov/news/2025

Landefeld, J. S., Seskin, E. P., & Fraumeni, B. M. (2008). Taking the pulse of the economy: Measuring GDP. Journal of Economic Perspectives, 22(2), 193-216. https://doi.org/10.1257/jep.22.2.193

Mankiw, N. G. (2021). Principles of macroeconomics (9th ed.). Cengage.