Update DS-00002: U.S. Gross Domestic Product (Real GDP) - 2025-10-25

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 # U.S. Gross Domestic Product (GDP) - Real GDP Time Series
 **Source ID:** DS-00002
 **Record Created:** 2025-10-25
 **Last Updated:** 2025-10-25
 **Cataloger:** Substrate Data Curation
 **Review Status:** Reviewed
 ---
 ## Bibliographic Information
 ### Title Statement
 - **Main Title:** Real Gross Domestic Product (GDPC1, GDPCA)
 - **Subtitle:** Quarterly and Annual U.S. GDP in Chained 2017 Dollars
 - **Abbreviated Title:** Real GDP, GDPC1
 - **Variant Titles:** U.S. Real GDP, Chained-Dollar GDP, Real Gross Domestic Product
 ### Responsibility Statement
 - **Publisher/Issuing Body:** Federal Reserve Bank of St. Louis (FRED)
 - **Department/Division:** Federal Reserve Economic Data (FRED) Division
 - **Contributors:** Bureau of Economic Analysis (BEA - primary source), U.S. Department of Commerce
 - **Contact Information:** stlsFRED@stls.frb.org
 ### Publication Information
 - **Place of Publication:** St. Louis, Missouri, USA (FRED); Washington, D.C., USA (BEA)
 - **Date of First Publication:** 1947 (quarterly), 1929 (annual)
 - **Publication Frequency:** Quarterly (with three-stage revision process)
 - **Current Status:** Active
 ### Edition/Version Information
 - **Current Version:** Continuous updates (quarterly releases + annual comprehensive update)
 - **Version History:** September annual comprehensive updates revise 5+ years of historical data
 - **Versioning Scheme:** Three-stage quarterly revision (advance, second, third estimates) + annual September comprehensive
 ---
 ## Authority Statement
 ### Organizational Authority
 **Issuing Organization Analysis:**
 - **Official Name:** Federal Reserve Bank of St. Louis (FRED aggregator); Bureau of Economic Analysis (BEA - primary authority)
 - **Type:** Federal Reserve Bank (FRED); Federal Government Statistical Agency (BEA)
 - **Established:** FRED: 1991; BEA: 1972 (successor to earlier agencies dating to 1945)
 - **Mandate:** Federal Reserve Act (FRED); BEA Act of 1972 - authority to compile, analyze, and publish economic statistics
 - **Parent Organization:** Federal Reserve System (FRED); U.S. Department of Commerce (BEA)
 - **Governance Structure:** Federal Reserve Bank board (FRED); Presidential appointment + Senate confirmation (BEA Director)
 **Domain Authority:**
 - **Subject Expertise:** Economic statistics, national accounts, GDP methodology (BEA 50+ years); economic data aggregation (FRED 30+ years)
 - **Recognition:** BEA is U.S. principal statistical agency for economic accounts; FRED aggregates 841,000+ time series from 118 sources
 - **Publication History:** GDP published since 1942 (annual), 1947 (quarterly); FRED since 1991
 - **Peer Recognition:** Federal Reserve, Treasury, Congressional Budget Office, IMF, World Bank, OECD cite BEA GDP; FRED used by millions of researchers
 **Quality Oversight:**
 - **Peer Review:** BEA methodology reviewed by National Academies, academic economists
 - **Editorial Board:** BEA Advisory Committee (academic economists, business representatives)
 - **Scientific Committee:** Bureau of Economic Analysis leadership (professional economists)
 - **External Audit:** Subject to Government Accountability Office (GAO) oversight
 - **Certification:** Follows United Nations System of National Accounts (2008 SNA) international standards
 **Independence Assessment:**
 - **Funding Model:** Federal appropriations (no commercial interests)
 - **Political Independence:** Professional statistical agency; BEA Director serves under civil service protections
 - **Commercial Interests:** None (federal government mission)
 - **Transparency:** Complete methodology documentation; data vintages preserved; revisions documented
 ### Data Authority
 **Provenance Classification:**
 - **Source Type:** Primary (BEA direct compilation from source data)
 - **Data Origin:** BEA compiles GDP from ~400 source datasets (Census Bureau, IRS tax data, BLS surveys, industry reports)
 - **Chain of Custody:** Source agencies → BEA compilation → National Income and Product Accounts (NIPA) → FRED aggregation → Public access
 **Primary Source Characteristics:**
 - BEA is the authoritative U.S. statistical agency for GDP compilation
 - Direct compilation from administrative records, surveys, and other government statistical sources
 - Legal mandate under BEA Act of 1972
 - Follows internationally-recognized System of National Accounts (SNA) framework
 ---
 ## Scope Note
 ### Content Description
 **Subject Coverage:**
 - **Primary Subjects:** Macroeconomics, National Accounts, Economic Activity, GDP
 - **Secondary Subjects:** Business Cycles, Economic Growth, Economic Forecasting
 - **Subject Classification:**
  - LC: HB (Economic Theory), HC (Economic History and Conditions)
  - Dewey: 330.973 (U.S. Economics)
 - **Keywords:** GDP, Gross Domestic Product, real GDP, economic output, national accounts, NIPA, chained dollars, economic growth, recession, business cycle
 **Geographic Coverage:**
 - **Spatial Scope:** United States (50 states + D.C. + territories)
 - **Countries/Regions Included:** United States only
 - **Geographic Granularity:** National aggregate (state-level GDP available in separate BEA datasets)
 - **Coverage Completeness:** 100% of U.S. economic activity
 - **Notable Exclusions:** Underground economy, informal sector estimated but not fully captured
 **Temporal Coverage:**
 - **Start Date:** 1947-Q1 (quarterly), 1929 (annual)
 - **End Date:** Present (ongoing quarterly updates)
 - **Historical Depth:** 78+ years (quarterly), 96+ years (annual)
 - **Frequency of Observations:** Quarterly (4 times per year)
 - **Temporal Granularity:** Quarter-level, Annual
 - **Time Series Continuity:** Excellent; continuous data with documented revisions
 **Population/Cases Covered:**
 - **Target Population:** All economic activity within United States
 - **Inclusion Criteria:** All goods and services produced within U.S. borders
 - **Exclusion Criteria:** Economic activity outside U.S. borders (even by U.S. firms)
 - **Coverage Rate:** Comprehensive national accounts
 - **Sample vs. Census:** Combination - some components from Census data, others from sample surveys aggregated to national totals
 **Variables/Indicators:**
 - **Number of Variables:** 2 primary series (GDPC1 quarterly, GDPCA annual); 100+ related NIPA tables
 - **Core Indicators:**
  - Real GDP (billions of chained 2017 dollars)
  - GDP growth rates (quarter-over-quarter, year-over-year)
  - Quarterly seasonally adjusted values
  - Annual values (not seasonally adjusted)
 - **Derived Variables:** GDP growth rates, annualized quarterly growth, real per capita GDP
 - **Data Dictionary Available:** Yes - BEA NIPA Handbook
 ### Content Boundaries
 **What This Source IS:**
 - Gold-standard measure of U.S. economic activity
 - Primary indicator used by Federal Reserve for monetary policy
 - Official U.S. government economic statistic
 - Internationally-comparable using UN System of National Accounts framework
 - Best source for understanding U.S. economic trends and business cycles
 **What This Source IS NOT:**
 - NOT a measure of economic well-being or quality of life
 - NOT a complete measure of all economic value (excludes household production, volunteer work, environmental costs)
 - NOT adjusted for income distribution or inequality
 - NOT real-time (3-month lag from quarter end to third estimate)
 - NOT granular below national level (use state GDP datasets for subnational analysis)
 **Comparison with Similar Sources:**
 | Source | Advantages Over This Source | Disadvantages vs. This Source |
 |--------|----------------------------|-------------------------------|
 | GDPNow (Atlanta Fed) | Real-time nowcast (within current quarter) | Not official data; frequently revised; less reliable |
 | World Bank GDP Data | Global coverage; cross-country comparisons | Sources U.S. data from BEA anyway; use BEA directly for U.S. |
 | OECD GDP Data | OECD member comparisons | Sources U.S. data from BEA anyway; use BEA directly for U.S. |
 | Nominal GDP (not real) | Current dollar values for some analyses | Not inflation-adjusted; poor for historical comparisons |
 ---
 ## Access Conditions
 ### Technical Access
 **API Information:**
 - **Endpoint URL:** https://fred.stlouisfed.org/graph/fredgraph.csv?id=GDPC1 (quarterly), https://fred.stlouisfed.org/graph/fredgraph.csv?id=GDPCA (annual)
 - **API Type:** Direct CSV download (HTTP GET); also FRED API available
 - **API Version:** FRED API v1
 - **OpenAPI/Swagger Spec:** https://fred.stlouisfed.org/docs/api/fred/
 - **SDKs/Libraries:** Python (fredapi), R (fredr), unofficial libraries for other languages
 **Authentication:**
 - **Authentication Required:** No (for CSV); Yes for FRED API
 - **Authentication Type:** API Key (free) for FRED API
 - **Registration Process:** Sign up at https://fredaccount.stlouisfed.org/apikeys
 - **Approval Required:** No (instant API key)
 - **Approval Timeframe:** Immediate
 **Rate Limits:**
 - **Requests per Second:** Not documented for CSV download; reasonable use expected
 - **Requests per Day:** FRED API: 120 requests/minute
 - **Concurrent Connections:** Not specified
 - **Throttling Policy:** API enforces rate limits with 429 status code
 - **Rate Limit Headers:** Not provided for CSV; API includes rate limit info
 **Query Capabilities:**
 - **Filtering:** CSV downloads full series; FRED API supports date range filtering
 - **Sorting:** Chronological (inherent in time series)
 - **Pagination:** Not applicable (full series download)
 - **Aggregation:** Pre-aggregated quarterly/annual data
 - **Joins:** Not applicable (single time series)
 **Data Formats:**
 - **Available Formats:** CSV (direct download), JSON/XML (FRED API)
 - **Format Quality:** Well-formed CSV; UTF-8 encoded; consistent schema
 - **Compression:** Not compressed
 - **Encoding:** UTF-8
 **Download Options:**
 - **Bulk Download:** Yes - full CSV download
 - **Streaming API:** No
 - **FTP/SFTP:** No
 - **Torrent:** No
 - **Data Dumps:** Full series download each time (not incremental)
 **Reliability Metrics:**
 - **Uptime:** Very high (99.9%+ estimated); Federal Reserve infrastructure
 - **Latency:** <1 second for CSV download
 - **Breaking Changes:** Schema stable for decades; BEA methodology changes documented years in advance
 - **Deprecation Policy:** Federal Reserve commitment to long-term data availability
 - **Service Level Agreement:** No formal SLA (federal government service)
 ### Legal/Policy Access
 **License:**
 - **License Type:** Public Domain (U.S. Government Work)
 - **License Version:** N/A
 - **License URL:** https://www.usa.gov/government-works
 - **SPDX Identifier:** CC0-1.0 (effectively public domain for U.S. government data)
 **Usage Rights:**
 - **Redistribution Allowed:** Yes (public domain)
 - **Commercial Use Allowed:** Yes (public domain)
 - **Modification Allowed:** Yes (public domain)
 - **Attribution Required:** Not legally required; citation recommended as scholarly best practice
 - **Share-Alike Required:** No
 **Cost Structure:**
 - **Access Cost:** Free
 **Terms of Service:**
 - **TOS URL:** https://fred.stlouisfed.org/legal/
 - **Key Restrictions:** No restrictions (public domain); standard disclaimer
 - **Liability Disclaimers:** Federal Reserve not liable for decisions based on data
 - **Privacy Policy:** FRED collects website analytics; no personal data in economic statistics
 ---
 ## Source Evaluation Narrative
 ### Methodological Assessment
 **Data Collection Methodology:**
 **Sampling Design:**
 - **Method:** Combination - Census data (decennial census, economic census), administrative records (IRS, Social Security), sample surveys (BLS, Census Bureau monthly/quarterly surveys)
 - **Sample Size:** Varies by source dataset (millions of firms for economic census)
 - **Sampling Frame:** Universe of U.S. economic establishments and households
 - **Stratification:** By industry, firm size, geographic region (varies by source data)
 - **Weighting:** Post-stratification weights applied; benchmarking to census years
 **Data Collection Instruments:**
 - **Instrument Type:** Administrative records (tax filings), establishment surveys, household surveys
 - **Validation:** BEA applies consistency checks across ~400 source datasets
 - **Question Wording:** Varies by source agency (BLS, Census Bureau, etc.)
 - **Mode:** Administrative data, mail/web surveys, in-person surveys
 **Quality Control Procedures:**
 - **Field Supervision:** Varies by source agency (BLS, Census Bureau have extensive QC)
 - **Validation Rules:** BEA cross-validates source datasets; applies balancing identities (e.g., income = expenditure = product approaches must match)
 - **Consistency Checks:** Three independent approaches to GDP (expenditure, income, product) cross-validated
 - **Verification:** Benchmarking to quinquennial economic census
 - **Outlier Treatment:** Statistical methods to identify and investigate outliers
 **Error Characteristics:**
 - **Sampling Error:** Varies by component; major components have low sampling error due to census/administrative data
 - **Non-sampling Error:** Coverage gaps (underground economy estimated at ~1-2% of GDP); measurement error in service sector
 - **Known Biases:** Informal economy undercounted; rapid technological change challenges deflation
 - **Accuracy Bounds:** BEA does not publish official confidence intervals; academic estimates suggest ±0.5-1.0% for quarterly growth rates
 **Methodology Documentation:**
 - **Transparency Level:** 5/5 (Exemplary)
 - **Documentation URL:** https://www.bea.gov/resources/methodologies/nipa-handbook
 - **Peer Review Status:** BEA methods reviewed by National Academies; published in peer-reviewed journals
 - **Reproducibility:** Methodology fully documented; data sources identified; replication possible with access to source data
 ### Currency Assessment
 **Update Characteristics:**
 - **Update Frequency:** Quarterly (three releases per quarter: advance, second, third estimates)
 - **Update Reliability:** Extremely consistent; releases follow strict schedule (8:30 AM ET)
 - **Update Notification:** BEA release calendar published; FRED email alerts available
 - **Last Updated:** 2025-10-25 (check quarterly after BEA third estimate)
 **Timeliness:**
 - **Collection to Publication Lag:** ~30 days (advance), ~60 days (second), ~90 days (third estimate)
 - **Factors Affecting Timeliness:** Availability of source data from partner agencies; quality review process
 - **Historical Timeliness:** Consistent three-stage release process maintained for decades
 **Currency for Different Uses:**
 - **Real-time Analysis:** Unsuitable (3-month lag to third estimate); use GDPNow for nowcasting
 - **Recent Trends:** Excellent (quarterly updates capture trends within 1-3 months)
 - **Historical Research:** Excellent (continuous series 1947-present quarterly, 1929-present annual)
 ### Objectivity Assessment
 **Potential Biases:**
 **Political Bias:**
 - **Government Influence:** Statistical agency independence protected by professional standards; BEA Director serves under civil service
 - **Editorial Stance:** Professional statistical neutrality mandated
 - **Political Pressure:** Rare instances of political commentary on GDP; methodology insulated from political pressure
 **Commercial Bias:**
 - **Funding Sources:** Federal appropriations (no commercial interests)
 - **Advertising Influence:** Not applicable
 - **Proprietary Interests:** None
 **Cultural/Social Bias:**
 - **Geographic Bias:** National aggregates mask regional differences
 - **Social Perspective:** Market-based production; excludes household production, volunteer work
 - **Language Bias:** English-language documentation
 - **Selection Bias:** Market economy focus; informal/underground economy estimated but not directly measured
 **Transparency:**
 - **Bias Disclosure:** BEA acknowledges measurement challenges (services deflation, underground economy, etc.)
 - **Limitations Stated:** Comprehensive in methodology documentation
 - **Raw Data Available:** Aggregated data; underlying source data from partner agencies
 ### Reliability Assessment
 **Consistency:**
 - **Internal Consistency:** Three approaches to GDP (expenditure, income, product) must reconcile; statistical discrepancy published
 - **Temporal Consistency:** Time series maintained with documented revisions; chained-dollar methodology ensures comparability
 - **Cross-source Consistency:** BEA GDP corroborated by independent indicators (employment, industrial production, income)
 **Stability:**
 - **Definition Changes:** Rare major methodology changes (2013: comprehensive revision; 2018: adoption of 2008 SNA); changes documented years in advance
 - **Methodology Changes:** Annual comprehensive updates each September refine historical estimates
 - **Series Breaks:** Clearly documented when methodology changes; historical data revised for consistency
 **Verification:**
 - **Independent Verification:** Academic economists validate BEA methods; international organizations (IMF, OECD) review U.S. national accounts
 - **Replication Studies:** Multiple academic papers use BEA GDP; discrepancies investigated and resolved
 - **Audit Results:** GAO reviews BEA processes; no major data quality issues identified
 ### Accuracy Assessment
 **Validation Evidence:**
 - **Benchmark Comparisons:** Benchmarked to quinquennial economic census (high accuracy)
 - **Coverage Assessments:** Estimated 98-99% coverage of market-based production
 - **Error Studies:** Academic research suggests quarterly growth rate accuracy ±0.5-1.0 percentage points
 **Accuracy for Different Uses:**
 - **Point Estimates:** High reliability for quarterly/annual GDP levels
 - **Trend Analysis:** Extremely reliable for medium-term trends (1+ years)
 - **Cross-sectional Comparison:** Reliable for comparing U.S. to other countries using SNA framework
 - **Sub-population Analysis:** Not available (national aggregates only; use state GDP for subnational)
 ---
 ## Known Limitations and Caveats
 ### Coverage Limitations
 **Geographic Gaps:**
 - National aggregates only (no subnational detail in this series)
 - U.S. territories (Puerto Rico, Guam, etc.) reported separately
 **Temporal Gaps:**
 - Pre-1929 data not official BEA compilation (use MeasuringWorth for 1790-1928 estimates)
 **Population Exclusions:**
 - Underground economy (estimated at 1-2% of GDP) only partially captured
 - Household production (home cooking, childcare, etc.) not included
 - Volunteer work not included
 **Variable Gaps:**
 - No demographic breakdowns (by income, race, age)
 - No distributional measures (GDP per capita available but not by income group)
 - Environmental costs not deducted from GDP
 ### Methodological Limitations
 **Sampling Limitations:**
 - Smaller industries/services may have larger sampling error
 - New industries (tech, gig economy) measurement challenges
 **Measurement Limitations:**
 - Service sector deflation challenging (quality improvements hard to price)
 - Rapid technological change complicates inflation adjustment
 - Software, R&D valuation subjective
 **Processing Limitations:**
 - Quarterly data seasonally adjusted (removes seasonal patterns but introduces estimation)
 - Chained-dollar method creates non-additive components
 - Revisions can be substantial (advance vs. third estimate)
 ### Comparability Limitations
 **Cross-national Comparability:**
 - Different countries use SNA framework but implementation varies
 - Exchange rate fluctuations complicate international comparisons
 - PPP adjustments needed for cross-country living standard comparisons
 **Temporal Comparability:**
 - Methodology changes (2013 comprehensive revision major) create series breaks
 - Chained-dollar base year updated periodically (currently 2017)
 **Sub-group Comparability:**
 - National aggregates cannot be disaggregated by demographics
 ### Usage Caveats
 **Inappropriate Uses:**
 1. **DO NOT use GDP as sole measure of well-being** - use broader indicators (HDI, median income, etc.)
 2. **DO NOT assume GDP growth benefits all equally** - use distributional data (Census income statistics)
 3. **DO NOT use for real-time nowcasting** - use GDPNow or other nowcasting models
 4. **DO NOT use for subnational analysis** - use state/metro GDP datasets from BEA
 **Ecological Fallacy Risks:**
 - National GDP growth does not imply all households/regions benefited
 - Aggregate growth can mask rising inequality
 **Correlation vs. Causation:**
 - GDP is descriptive (what was produced), not explanatory (why it was produced)
 - Associations with other variables do not imply causation
 ---
 ## Recommended Use Cases
 ### Ideal Applications
 **Research Questions Well-Suited:**
 1. "How has U.S. economic output changed over time?"
 2. "Was the U.S. in a recession during a specific period?"
 3. "How do different presidential administrations compare on economic growth?"
 4. "What was the economic impact of major events (9/11, COVID-19, financial crisis)?"
 **Analysis Types Supported:**
 - Time series trend analysis
 - Business cycle identification
 - Economic growth comparisons across periods
 - Recession dating and severity assessment
 - Policy impact analysis (fiscal stimulus, tax changes)
 - Forecasting and econometric modeling
 ### Appropriate Contexts
 **Geographic Contexts:**
 - U.S. national-level economic analysis
 - International comparisons (U.S. vs. other countries)
 **Temporal Contexts:**
 - Quarterly analysis (1947-present)
 - Annual analysis (1929-present)
 - Long-term growth trends (multiple decades)
 **Subject Contexts:**
 - Macroeconomic research
 - Business cycle analysis
 - Economic policy evaluation
 - Financial market analysis
 ### Use Warnings
 **Avoid Using This Source For:**
 1. **Income distribution analysis** → Use Census Bureau income statistics
 2. **Subnational economic analysis** → Use BEA state GDP, metro GDP datasets
 3. **Real-time nowcasting** → Use Atlanta Fed GDPNow
 4. **Well-being measurement** → Use Human Development Index, Genuine Progress Indicator
 5. **Individual household economic status** → Use microdata from Census, BLS surveys
 **Recommended Alternatives For:**
 - Income inequality → Census Bureau, IRS Statistics of Income
 - State/regional economies → BEA Regional GDP data
 - Real-time economic activity → GDPNow, weekly economic indicators
 - International GDP → OECD, World Bank (for other countries)
 - Sectoral detail → BEA NIPA detailed tables
 ---
 ## Citation
 ### Preferred Citation Format
 **APA 7th:**
 U.S. Bureau of Economic Analysis. (2025). *Real Gross Domestic Product* [GDPC1], retrieved from FRED, Federal Reserve Bank of St. Louis. https://fred.stlouisfed.org/series/GDPC1
 **Chicago 17th:**
 U.S. Bureau of Economic Analysis. "Real Gross Domestic Product [GDPC1]." FRED, Federal Reserve Bank of St. Louis. Accessed October 25, 2025. https://fred.stlouisfed.org/series/GDPC1.
 **MLA 9th:**
 U.S. Bureau of Economic Analysis. *Real Gross Domestic Product* [GDPC1]. FRED, Federal Reserve Bank of St. Louis, 2025, fred.stlouisfed.org/series/GDPC1.
 **Vancouver:**
 U.S. Bureau of Economic Analysis. Real Gross Domestic Product [GDPC1] [Internet]. St. Louis: FRED, Federal Reserve Bank of St. Louis; 2025 [cited 2025 Oct 25]. Available from: https://fred.stlouisfed.org/series/GDPC1
 **BibTeX:**
 ```bibtex
@misc{bea_gdp_2025,
  author = {{U.S. Bureau of Economic Analysis}},
  title = {Real Gross Domestic Product [GDPC1]},
  year = {2025},
  howpublished = {FRED, Federal Reserve Bank of St. Louis},
  url = {https://fred.stlouisfed.org/series/GDPC1},
  note = {Accessed: 2025-10-25}
 }
 ```
 ---
 ## Cross-Reference Section Structure
 **Supports Claims:**
 - (none yet - can be added later by entry maintainers)
 **Documents Problems:**
 - (none yet - can be added later by entry maintainers)
 **Informs Arguments:**
 - (none yet - can be added later by entry maintainers)
 **Used in Projects:**
 - (none yet - can be added later by entry maintainers)
 *Cross-references can be added by entry maintainers as needed.*
 ---
 **END OF SOURCE RECORD**
--- a/Data/US-GDP/update.log
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 [2025-10-25T00:47:07.485Z] === Update Started ===
 [2025-10-25T00:47:07.485Z] Source: U.S. Gross Domestic Product (Real GDP)
 [2025-10-25T00:47:07.485Z] Source ID: DS-00002
 [2025-10-25T00:47:07.485Z] Checking source availability...
 [2025-10-25T00:47:07.485Z] Source is available
 [2025-10-25T00:47:07.485Z] Fetching Quarterly Real GDP (GDPC1) data...
 [2025-10-25T00:47:07.485Z] Quarterly Real GDP (GDPC1) schema validation passed
 [2025-10-25T00:47:07.485Z] Quarterly Real GDP (GDPC1) first record: 1947-01-01,2182.681
 [2025-10-25T00:47:07.485Z] Quarterly Real GDP (GDPC1) last record: 2025-04-01,23770.976
 [2025-10-25T00:47:07.485Z] Quarterly Real GDP (GDPC1): 314 records retrieved
 [2025-10-25T00:47:07.485Z] Fetching Annual Real GDP (GDPCA) data...
 [2025-10-25T00:47:07.485Z] Annual Real GDP (GDPCA) schema validation passed
 [2025-10-25T00:47:07.485Z] Annual Real GDP (GDPCA) first record: 1929-01-01,1191.124
 [2025-10-25T00:47:07.485Z] Annual Real GDP (GDPCA) last record: 2024-01-01,23358.435
 [2025-10-25T00:47:07.485Z] Annual Real GDP (GDPCA): 96 records retrieved
 [2025-10-25T00:47:07.485Z] Performing data quality checks...
 [2025-10-25T00:47:07.485Z] Quality checks passed
 [2025-10-25T00:47:07.485Z] Saving data files...
 [2025-10-25T00:47:07.485Z] Quarterly data saved to: /Users/daniel/Library/Mobile Documents/com~apple~CloudDocs/Projects/Substrate/Data/US-GDP/Real-GDP-Quarterly-1947-2025.csv
 [2025-10-25T00:47:07.485Z] Annual data saved to: /Users/daniel/Library/Mobile Documents/com~apple~CloudDocs/Projects/Substrate/Data/US-GDP/Real-GDP-Annual-1929-2024.csv
 [2025-10-25T00:47:07.485Z] Updating source record...
 [2025-10-25T00:47:07.485Z] Source record updated
 [2025-10-25T00:47:07.485Z] 
 Update Summary:
 - Timestamp: 2025-10-25T00:47:07.485Z
 - Availability: OK
 - Data Quality: PASSED
 - Quarterly Records: 314
 - Annual Records: 96
 - Quarterly File Size: 6.29 KB
 - Annual File Size: 1.93 KB
 [2025-10-25T00:47:07.485Z] Checking for git repository...
 [2025-10-25T00:47:07.485Z] Git repository detected - committing changes...