Chapter 4 — Key Takeaways

The four federal statistical agencies (and FRED)

  • BLS — Bureau of Labor Statistics (jobs, unemployment, CPI, wages)
  • BEA — Bureau of Economic Analysis (GDP, personal income, trade)
  • Census Bureau — demographics, household income, poverty, business formation
  • Federal Reserve — money, banking, financial system; FRED (fred.stlouisfed.org) is the unified interface to most of the data above

Reading a BLS jobs report

The headline numbers are nonfarm payroll change (Establishment Survey) and the U-3 unemployment rate (Household Survey). What journalists usually miss:

  1. Labor force participation rate — falling unemployment can mean discouragement, not hiring
  2. U-6 — broader unemployment measure including marginal and part-time-for-economic-reasons workers
  3. Real wage growth — wages growing slower than inflation means living standards are falling
  4. Diffusion index — broad-based growth vs. concentrated growth
  5. Revisions — last month's report often gets revised significantly
  6. Household-establishment gap — the two surveys often disagree, and the gap is informative

Reading a CPI release

The CPI tracks the price of a fixed basket of about 80,000 items in eight major categories. Set to 100 for 1982–84.

Headline vs. core: - Headline CPI = all items (what consumers experience) - Core CPI = excludes food and energy (less volatile, what central banks watch)

The three biases (each tends to overstate true inflation): 1. Substitution bias — consumers switch to cheaper alternatives; fixed basket misses it 2. New goods bias — new products enter the basket with a lag, missing initial price declines 3. Quality change bias — improvements in product quality not fully captured by hedonic adjustment

Combined, these biases probably overstate inflation by ~0.5–1.0 percentage point per year.

Why your experience differs from the official rate: what you actually buy ≠ the BLS basket; salience bias (you notice price increases more than decreases); loss aversion; whether you own or rent.

FRED — the most useful free data tool in economics

  • 800,000+ series, all free
  • Search by concept ("unemployment") or by series ID ("UNRATE")
  • Compare multiple series; adjust the time window; convert nominal to real; download CSVs
  • Useful series IDs: UNRATE, CIVPART, CPIAUCSL, GDPC1, MEHOINUSA672N, FEDFUNDS, PAYEMS

Three ways economic charts mislead

  1. Truncated y-axis — small changes look huge when the y-axis doesn't start at zero
  2. Cherry-picked time period — the same data tells different stories in different windows
  3. Wrong measure — median vs. mean, real vs. nominal, stock vs. flow, U-3 vs. U-6, headline vs. core

When you see a chart, always check the y-axis, the time period, and which measure is being used.

The six-step procedure for fact-checking economic claims

  1. Identify the claim precisely
  2. Find the source — where does the writer say the data came from?
  3. Look up the data in FRED
  4. Check the time period and measure
  5. Check the context — is the headline number the most informative one?
  6. Form your own judgment

Themes this chapter touched

  • Data tells stories — foundational, established as a recurring frame for every subsequent chapter
  • Disagreement — even careful measurement involves choices that reasonable people can dispute
  • Affects daily life — economic data literacy is a practical skill for civic life

One sentence summary

Every economic number is a measurement choice — the question is not whether the number is "true" but what choice was made and whether the choice is the right one for the question being asked.

Where this leads

Part II opens with Chapter 5 — Supply and Demand, the foundational model of microeconomics. From here on, the textbook will assume you can look up real prices and quantities yourself. Bookmark FRED.