Broken Links Found in Documentation

[github-actions]

Link Check Report

🚨 5 broken link(s) and 16 redirect(s) were found in the documentation.

Details:

• Repository: QuantEcon/lecture-python-intro
• Workflow: Link Checker [Anaconda, Linux]
• Run ID: 28768094040
• Commit: ffc92c2
• Branch: main
• Date: 2026-07-06T04:48:40.469Z

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Link Check Summary

• Total broken links: 5
• Total redirects found: 16

Broken Links

_site/inflation_history.html - 1 redirect(s):
🔄 https://github.com/QuantEcon/lecture-python-intro/raw/main/lectures/datasets/chapter_3.xlsx -> https://raw.githubusercontent.com/QuantEcon/lecture-python-intro/main/lectures/datasets/chapter_3.xlsx (1 redirects)

_site/linear_equations.html - 1 redirect(s):
🔄 http://www.mathsisfun.com/algebra/matrix-multiplying.html -> https://www.mathsisfun.com/algebra/matrix-multiplying.html (1 redirects)

_site/long_run_growth.html - 1 redirect(s):
🔄 https://en.wikipedia.org/wiki/international_dollar -> https://en.wikipedia.org/wiki/International_dollar (1 redirects)

_site/eigen_I.html - 1 redirect(s):
🔄 https://pythonnumericalmethods.berkeley.edu/notebooks/chapter15.02-The-Power-Method.html -> https://pythonnumericalmethods.studentorg.berkeley.edu/notebooks/chapter15.02-The-Power-Method.html (1 redirects)

_site/zreferences.html - 3 redirect(s):
🔄 https://doi.org/https://doi.org/10.2307/1235116 -> https://onlinelibrary.wiley.com/doi/10.2307/1235116 (1 redirects)
🔄 https://link.springer.com/10.1007/978-1-4614-3284-5 -> https://link.springer.com/book/10.1007/978-1-4614-3284-5 (3 redirects)
🔄 https://doi.org/10.1007/978-1-4614-3284-5 -> https://link.springer.com/book/10.1007/978-1-4614-3284-5 (4 redirects)

_site/markov_chains_I.html - 3 redirect(s):
🔄 http://quantecon.org/quantecon-py -> https://quantecon.org/quantecon-py/ (2 redirects)
🔄 http://quantecon.org/quantecon-py -> https://quantecon.org/quantecon-py/ (2 redirects)
🔄 http://quantecon.org/quantecon-py -> https://quantecon.org/quantecon-py/ (2 redirects)

_site/inequality.html - 2 redirect(s):
🔄 https://blogs.worldbank.org/opendata/introducing-wbgapi-new-python-package-accessing-world-bank-data -> https://blogs.worldbank.org/en/opendata/introducing-wbgapi-new-python-package-accessing-world-bank-data (1 redirects)
🔄 https://github.com/QuantEcon/lecture-python-intro/tree/main/lectures/_static/lecture_specific/inequality/data.ipynb -> https://github.com/QuantEcon/lecture-python-intro/blob/main/lectures/_static/lecture_specific/inequality/data.ipynb (1 redirects)

_site/simple_linear_regression.html - 1 redirect(s):
🔄 https://github.com/QuantEcon/lecture-python-intro/raw/main/lectures/_static/lecture_specific/simple_linear_regression/life-expectancy-vs-gdp-per-capita.csv -> https://raw.githubusercontent.com/QuantEcon/lecture-python-intro/main/lectures/_static/lecture_specific/simple_linear_regression/life-expectancy-vs-gdp-per-capita.csv (1 redirects)

_site/business_cycle.html - 5 broken link(s):
❌ https://fred.stlouisfed.org/ - Status: 0 (Timeout)
Link text: FRED
❌ https://fred.stlouisfed.org/series/M0892AUSM156SNBR - Status: 0 (Timeout)
Link text: 1929-1942
❌ https://fred.stlouisfed.org/series/UNRATE - Status: 0 (Timeout)
Link text: 1948 onwards
❌ https://fred.stlouisfed.org/series/UMCSENT - Status: 0 (Timeout)
Link text: consumer sentiment index
❌ https://fred.stlouisfed.org/series/CPILFESL - Status: 0 (Timeout)
Link text: core consumer price index

_site/business_cycle.html - 1 redirect(s):
🔄 https://www.worldbank.org/en/home -> https://www.worldbank.org/ext/en/home (1 redirects)

_site/markov_chains_II.html - 1 redirect(s):
🔄 http://quantecon.org/quantecon-py -> https://quantecon.org/quantecon-py/ (2 redirects)

_site/troubleshooting.html - 1 redirect(s):
🔄 https://quantecon.org/quantecon-py -> https://quantecon.org/quantecon-py/ (1 redirects)

AI-Powered Suggestions

_site/inflation_history.html - AI Suggestions:
🤖 https://github.com/QuantEcon/lecture-python-intro/raw/main/lectures/datasets/chapter_3.xlsx
Issue: Redirected 1 times
💡 redirect_update: https://raw.githubusercontent.com/QuantEcon/lecture-python-intro/main/lectures/datasets/chapter_3.xlsx
Reason: Update to final destination to avoid 1 redirect(s)

_site/linear_equations.html - AI Suggestions:
🤖 http://www.mathsisfun.com/algebra/matrix-multiplying.html
Issue: Redirected 1 times
💡 redirect_update: https://www.mathsisfun.com/algebra/matrix-multiplying.html
Reason: Update to final destination to avoid 1 redirect(s)

_site/long_run_growth.html - AI Suggestions:
🤖 https://en.wikipedia.org/wiki/international_dollar
Issue: Redirected 1 times
💡 redirect_update: https://en.wikipedia.org/wiki/International_dollar
Reason: Update to final destination to avoid 1 redirect(s)

_site/eigen_I.html - AI Suggestions:
🤖 https://pythonnumericalmethods.berkeley.edu/notebooks/chapter15.02-The-Power-Method.html
Issue: Redirected 1 times
💡 redirect_update: https://pythonnumericalmethods.studentorg.berkeley.edu/notebooks/chapter15.02-The-Power-Method.html
Reason: Update to final destination to avoid 1 redirect(s)

_site/zreferences.html - AI Suggestions:
🤖 https://doi.org/https://doi.org/10.2307/1235116
Issue: Redirected 1 times
💡 redirect_update: https://onlinelibrary.wiley.com/doi/10.2307/1235116
Reason: Update to final destination to avoid 1 redirect(s)
🤖 https://link.springer.com/10.1007/978-1-4614-3284-5
Issue: Redirected 3 times
💡 redirect_update: https://link.springer.com/book/10.1007/978-1-4614-3284-5
Reason: Update to final destination to avoid 3 redirect(s)
🤖 https://doi.org/10.1007/978-1-4614-3284-5
Issue: Redirected 4 times
💡 redirect_update: https://link.springer.com/book/10.1007/978-1-4614-3284-5
Reason: Update to final destination to avoid 4 redirect(s)

_site/markov_chains_I.html - AI Suggestions:
🤖 http://quantecon.org/quantecon-py
Issue: Redirected 2 times
💡 redirect_update: https://quantecon.org/quantecon-py/
Reason: Update to final destination to avoid 2 redirect(s)
🤖 http://quantecon.org/quantecon-py
Issue: Redirected 2 times
💡 redirect_update: https://quantecon.org/quantecon-py/
Reason: Update to final destination to avoid 2 redirect(s)
🤖 http://quantecon.org/quantecon-py
Issue: Redirected 2 times
💡 redirect_update: https://quantecon.org/quantecon-py/
Reason: Update to final destination to avoid 2 redirect(s)

_site/inequality.html - AI Suggestions:
🤖 https://blogs.worldbank.org/opendata/introducing-wbgapi-new-python-package-accessing-world-bank-data
Issue: Redirected 1 times
💡 redirect_update: https://blogs.worldbank.org/en/opendata/introducing-wbgapi-new-python-package-accessing-world-bank-data
Reason: Update to final destination to avoid 1 redirect(s)
🤖 https://github.com/QuantEcon/lecture-python-intro/tree/main/lectures/_static/lecture_specific/inequality/data.ipynb
Issue: Redirected 1 times
💡 redirect_update: https://github.com/QuantEcon/lecture-python-intro/blob/main/lectures/_static/lecture_specific/inequality/data.ipynb
Reason: Update to final destination to avoid 1 redirect(s)

_site/simple_linear_regression.html - AI Suggestions:
🤖 https://github.com/QuantEcon/lecture-python-intro/raw/main/lectures/_static/lecture_specific/simple_linear_regression/life-expectancy-vs-gdp-per-capita.csv
Issue: Redirected 1 times
💡 redirect_update: https://raw.githubusercontent.com/QuantEcon/lecture-python-intro/main/lectures/_static/lecture_specific/simple_linear_regression/life-expectancy-vs-gdp-per-capita.csv
Reason: Update to final destination to avoid 1 redirect(s)

_site/business_cycle.html - AI Suggestions:
🤖 https://www.worldbank.org/en/home
Issue: Redirected 1 times
💡 redirect_update: https://www.worldbank.org/ext/en/home
Reason: Update to final destination to avoid 1 redirect(s)

_site/markov_chains_II.html - AI Suggestions:
🤖 http://quantecon.org/quantecon-py
Issue: Redirected 2 times
💡 redirect_update: https://quantecon.org/quantecon-py/
Reason: Update to final destination to avoid 2 redirect(s)

_site/troubleshooting.html - AI Suggestions:
🤖 https://quantecon.org/quantecon-py
Issue: Redirected 1 times
💡 redirect_update: https://quantecon.org/quantecon-py/
Reason: Update to final destination to avoid 1 redirect(s)

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Next Steps:

1. Review the broken links listed above
2. Update or remove broken links from the source files
3. Consider applying AI suggestions for better alternatives
4. Re-run the link check to verify fixes

Note: This issue was automatically created by the AI-Powered Link Checker Action.

Please close this issue once all broken links have been addressed.