Activity: 12 new entries for 2026-10-14 to 2026-10-31

_data/activity/2026-10-14-lectures.yml

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+# Activity data: see "News and Activity" in README.md for the schema.
+# Written by the Activity feed for 2026-10-14.
+
+- date: 2026-10-14
+  type: lectures
+  project: Advanced Quantitative Economics with Python
+  url: https://python-advanced.quantecon.org/
+  summary: Added two new lectures, Policy Counterfactuals from Impulse Responses and Policy Regimes and the Lucas Critique, and modified three existing lectures on induced priors, Markov jump LQ, and supply and demand.
+  changes:
+  - title: 'Add policy_counterfactuals lecture: McKay-Wolf counterfactuals and invertibility'
+    url: https://github.com/QuantEcon/lecture-python-advanced.myst/pull/392

_data/activity/2026-10-16-lectures.yml

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+# Activity data: see "News and Activity" in README.md for the schema.
+# Written by the Activity feed for 2026-10-16.
+
+- date: 2026-10-16
+  type: lectures
+  project: Intermediate Quantitative Economics with Python
+  url: https://python.quantecon.org/
+  summary: Added a new lecture, Social Security Trust Fund Depletion.
+  changes:
+  - title: Add a lecture on Social Security trust fund depletion
+    url: https://github.com/QuantEcon/lecture-python.myst/pull/1091

_data/activity/2026-10-17-software.yml

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+# Activity data: see "News and Activity" in README.md for the schema.
+# Written by the Activity feed for 2026-10-17.
+
+- date: 2026-10-17
+  type: release
+  project: QuantEcon.py
+  version: v0.13.1
+  url: https://github.com/QuantEcon/QuantEcon.py/releases/tag/v0.13.1

_data/activity/2026-10-18-lectures.yml

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+# Activity data: see "News and Activity" in README.md for the schema.
+# Written by the Activity feed for 2026-10-18.
+
+- date: 2026-10-18
+  type: translation
+  project: Python Programming for Economics and Finance (French)
+  url: https://quantecon.github.io/lecture-python-programming.fr/
+  summary: Updated the French translations of the Polars, Pandas for Panel Data and Adventures with Autodiff lectures, among others.
+  changes:
+  - title: 'Python_oop: restore the French non-breaking spaces'
+    url: https://github.com/QuantEcon/lecture-python-programming.fr/pull/92
+  - title: Update about_py.md
+    url: https://github.com/QuantEcon/lecture-python-programming.fr/pull/84
+  - title: '[pandas_panel] Describe the single .replace() call, not a loop'
+    url: https://github.com/QuantEcon/lecture-python-programming.fr/pull/96
+  - title: '[autodiff] Open with a sentence that suits both series'
+    url: https://github.com/QuantEcon/lecture-python-programming.fr/pull/95
+  - title: '[polars] Fetch the FRED CSV with requests before parsing it'
+    url: https://github.com/QuantEcon/lecture-python-programming.fr/pull/97
+- date: 2026-10-18
+  type: translation
+  project: Python Programming for Economics and Finance (Persian)
+  url: https://quantecon.github.io/lecture-python-programming.fa/
+  summary: Updated the Persian translations of the Polars, Pandas for Panel Data, and Adventures with Autodiff lectures.
+  changes:
+  - title: '[polars] Fetch the FRED CSV with requests before parsing it'
+    url: https://github.com/QuantEcon/lecture-python-programming.fa/pull/171
+  - title: '[pandas_panel] Describe the single .replace() call, not a loop'
+    url: https://github.com/QuantEcon/lecture-python-programming.fa/pull/170
+  - title: '[autodiff] Open with a sentence that suits both series'
+    url: https://github.com/QuantEcon/lecture-python-programming.fa/pull/169

_data/activity/2026-10-19-lectures.yml

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+# Activity data: see "News and Activity" in README.md for the schema.
+# Written by the Activity feed for 2026-10-19.
+
+- date: 2026-10-19
+  type: lectures
+  project: Advanced Quantitative Economics with Python
+  url: https://python-advanced.quantecon.org/
+  summary: Updated Covariance Stationary Processes, Markov Jump Linear Quadratic Dynamic Programming, and Policy Regimes and the Lucas Critique for `quantecon` 0.13.1.
+  changes:
+  - title: Update lectures for quantecon 0.13.1
+    url: https://github.com/QuantEcon/lecture-python-advanced.myst/pull/393

_data/activity/2026-10-22-lectures.yml

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+# Activity data: see "News and Activity" in README.md for the schema.
+# Written by the Activity feed for 2026-10-22.
+
+- date: 2026-10-22
+  type: translation
+  project: Intermediate Quantitative Economics with Python (Simplified Chinese)
+  url: https://quantecon.github.io/lecture-python.zh-cn/
+  summary: Added Simplified Chinese translations of five lectures, including Which Moments to Match, Social Security Trust Fund Depletion and Investment Under Uncertainty, and revised twenty existing translated lectures.
+  changes:
+  - title: 'Sir_model: restore the 2025 reviewers'' wording lost in #302'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/305
+  - title: '[var_dmd, svd_intro, measurement_models] Correct math, add exercises'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/304
+  - title: '[var_dmd, svd_intro, measurement_models] Correct math, add exercises'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/303
+  - title: '[sir_model] update code and text'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/302
+  - title: 'Recover six small gaps: five state-file advances and harrison_kreps'' la.solve port'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/301
+  - title: 'Deliver gallant_tauchen and social_security_depletion (the lectures of closed #294 and #296)'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/300
+  - title: '[lucas_prescott_investment, optimal_growth_uncertainty] Two sequels to rational_expectations'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/286
+  - title: '[two_auctions] Add exercises and further reading'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/284
+  - title: '[house_auction] Add VCG comparison section and exercises'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/283
+  - title: 'Make main build again: install JAX in the environment, finish ak_aiyagari''s household rename, add the programming intersphinx key'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/297
+  - title: Register the CJK font in util_rand_resp — five figures render Chinese as tofu
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/274
+  - title: '[ak2, ak_aiyagari, two_computation] Correct math and economics, add exercises'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/290
+  - title: '[hoist_failure] Revise fault-tree lecture and add exercises'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/285
+  - title: Fix Samuelson quadratic formula
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/282
+  - title: '[tom] edits to a few lectures [ge_arrow, affine_risk_prices, and recovery_trio]'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/281
+  - title: '[linear_algebra] Some updates on code and style and typos'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/280
+  - title: '[qr_decomp] Some updates to code and wording'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/277
+  - title: '[lq_robust_bewley] verify observational equivalence'
+    url: https://github.com/QuantEcon/lecture-python.zh-cn/pull/269

_data/activity/2026-10-24-lectures.yml

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+# Activity data: see "News and Activity" in README.md for the schema.
+# Written by the Activity feed for 2026-10-24.
+
+- date: 2026-10-24
+  type: lectures
+  project: Intermediate Quantitative Economics with Python
+  url: https://python.quantecon.org/
+  summary: 'Revised Linear Quadratic Mean Field Games and split it into two lectures, adding Linear Quadratic Mean Field Games: Extensions.'
+  changes:
+  - title: '[lq_mean_field_games] Revise for the October 2026 draft and split into two lectures'
+    url: https://github.com/QuantEcon/lecture-python.myst/pull/1096

_data/activity/2026-10-25-lectures.yml

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+# Activity data: see "News and Activity" in README.md for the schema.
+# Written by the Activity feed for 2026-10-25.
+
+- date: 2026-10-25
+  type: lectures
+  project: Advanced Quantitative Economics with Python
+  url: https://python-advanced.quantecon.org/
+  summary: Added two new lectures, Policy Counterfactuals in a New Keynesian Economy and Invertibility and Policy Counterfactuals, and revised three related lectures on policy counterfactuals and induced priors.
+  changes:
+  - title: Add policy_invertibility and policy_counterfactuals_nk and revise McKay–Wolf lectures
+    url: https://github.com/QuantEcon/lecture-python-advanced.myst/pull/394

_data/activity/2026-10-27-lectures.yml

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+# Activity data: see "News and Activity" in README.md for the schema.
+# Written by the Activity feed for 2026-10-27.
+
+- date: 2026-10-27
+  type: lectures
+  project: Advanced Quantitative Economics with Python
+  url: https://python-advanced.quantecon.org/
+  summary: Added two new lectures, Gradualism in Self-Enforcing Trade Agreements and Institution Building Without Commitment.
+  changes:
+  - title: Add gradual_trade_agreements and organizational_equilibrium lectures
+    url: https://github.com/QuantEcon/lecture-python-advanced.myst/pull/396

_data/activity/2026-10-29-lectures.yml

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+# Activity data: see "News and Activity" in README.md for the schema.
+# Written by the Activity feed for 2026-10-29.
+
+- date: 2026-10-29
+  type: lectures
+  project: Advanced Quantitative Economics with Python
+  url: https://python-advanced.quantecon.org/
+  summary: Added a new lecture, Gradual Liberalization in a Global Production Network, and extended Institution Building Without Commitment.
+  changes:
+  - title: Add gradual_liberalization_network lecture and extend organizational_equilibrium
+    url: https://github.com/QuantEcon/lecture-python-advanced.myst/pull/399

_data/activity/2026-10-31-software.yml

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+# Activity data: see "News and Activity" in README.md for the schema.
+# Written by the Activity feed for 2026-10-31.
+
+- date: 2026-10-31
+  type: release
+  project: GameTheory.jl
+  version: v0.8.1
+  url: https://github.com/QuantEcon/GameTheory.jl/releases/tag/v0.8.1