# Intermediate macroeconomics chapt02

Chapter 2:
The Data of Macroeconomics

Stock vs. Flow
Stock: quantity measured at a given point in time
– Wealth
– Debt
– Budget

Flow: quantity measured per unit of time
– Income
– Employment
– Price

The Circular Flow on Income and Product
Households:
– sell labor resources to earn income
– spend income to buy products

Firms:
– buy labor resources to produce products
– sell products to earn income

The Circular Flow on Income and Product
Income Payment
Labor Resources
Labor Market

Firms

Households
Product Market
Products

Consumption Expenditure

Gross Domestic Product
Market value of all final goods and
services an economy produces in a
current time period (year or quarter)
Total income = Total expenditure
Total value-added (value of output minus
value of inputs at each production stage)

The GDP excludes the following items:
– Intermediate goods: avoid double counting
– Illegal goods and services: not to be produced
– Self-produced goods and services: non-market transactions

Treatment of inventories:
– Accumulation is treated as “expenditure,” thus reducing GDP
– Reduction is treated as a purchase (+) and a disinvestment (-),

hence offsetting each other

Imputation: estimation of the value of services
– Market rent for owner-occupied homes
– Cost of provision for government services

Note: Imputation is not applied to other services
such as private transportation

– GDP increases throughout the year, reaching a peak in the
fourth quarter and then falling in the first quarter
– We use a statistical technique to “smooth” seasonal variations

GDP Calculations
Nominal GDP = Current year prices * Current
year quantities
Real GDP = Base year prices * Current Year
quantities
GDP Deflator = Nominal GDP / Real GDP,
representing the general price level

Base Year Determination
Real GDP:
– Base year changes every five years

Chain-Weighted Real GDP:
– Base year changes continuously over time

Components of GDP
Nominal GDP
= Consumption
+ Investment
+ Government purchases
+ Net Exports: exports less imports

Y = C + I + G + NX
(1997 data in %: 100 = 68 + 15 + 18 –1)

Data

National Income Accounting
GNP: Gross National Product
= GDP

National Income Accounting
NNP: Net National Products
= GNP
- Depreciation or Consumption of Fixed Capital

National Income Accounting
NI: National Income
= NNP

National Income Accounting
PI: Personal Income
= NI
- Corporate Profits
- Social Insurance Contributions
- Net Interest
+ Dividends
+ Gov’t Transfer Payments to Individuals
+ personal Interest Income

National Income Accounting
DPI: Disposable Personal Income
= PI
- Personal Income Taxes

Measuring Cost of Living
Consumer Price Index:
– Average weighted prices of some 400 consumer products sold
in urban areas around the nation
– CPI = (current year market basket / base year market

GDP Deflator vs. CPI
Variable weights vs. Fixed weights
Domestic products vs. Domestic and imported
products

GDP Deflator vs. CPI

Does CPI Overstates Inflation?
CPI tends to overstate inflation because
– Substitution for less expensive goods is not considered in the
– New goods are continuously introduced in the market
– Improvement in the quality of goods is not considered

Population vs. Labor Force
Population = Labor force + + Not in labor force
In 1997, 203.1 million
Labor force = Employed + Unemployed
In 1997, 129.6 + 6.7 = 136.3 million

Population vs. Labor Force
6.7

Unemployed

Not in the labor
force
66.8

129.6
Employed

Labor Market Data
Unemployment rate = unemployed as % of labor
force
In 1997, (6.7/136.3)*100 = 4.9%
Labor force participation rate = labor force as %