ttsim-dev · hmgaudecker · Jul 24, 2025 · Jul 24, 2025 · Jul 24, 2025 · Jul 24, 2025
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
@@ -108,8 +108,8 @@ repos:
         name: Validate JSON/YAML files against schema
         entry: check-jsonschema
         language: python
-        files: ^(tests/ttsim/mettsim|src/_gettsim)/.*\.(yaml|yml)$
+        files: ^src/_gettsim/.*\.(yaml|yml)$
         args:
-          - --schemafile=src/ttsim/params-schema.json
+          - --schemafile=docs/geps/params-schema.json
 ci:
   autoupdate_schedule: monthly
diff --git a/CITATION b/CITATION
@@ -2,5 +2,5 @@
     Title  = {{The German Taxes and Transfers SIMulator}},
     Author = {{GETTSIM team}},
     Year   = {2022},
-    Url    = {https://github.com/iza-institute-of-labor-economics/gettsim}
+    Url    = {https://github.com/ttsim-dev/gettsim}
 }
diff --git a/README.md b/README.md
@@ -2,18 +2,18 @@
 ![PyPI - Version](https://img.shields.io/pypi/v/gettsim)
 [![image](https://img.shields.io/conda/vn/conda-forge/gettsim.svg)](https://anaconda.org/conda-forge/gettsim)
 [![image](https://img.shields.io/conda/pn/conda-forge/gettsim.svg)](https://anaconda.org/conda-forge/gettsim)
-[![main](https://github.com/iza-institute-of-labor-economics/gettsim/actions/workflows/main.yaml/badge.svg)](https://github.com/iza-institute-of-labor-economics/gettsim/actions/workflows/main.yaml)
-[![image](https://codecov.io/gh/iza-institute-of-labor-economics/gettsim/branch/main/graph/badge.svg)](https://codecov.io/gh/iza-institute-of-labor-economics/gettsim)
+[![main](https://github.com/ttsim-dev/gettsim/actions/workflows/main.yaml/badge.svg)](https://github.com/ttsim-dev/gettsim/actions/workflows/main.yaml)
+[![image](https://codecov.io/gh/ttsim-dev/gettsim/branch/main/graph/badge.svg)](https://codecov.io/gh/ttsim-dev/gettsim)
 [![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
-[![pre-commit.ci status](https://results.pre-commit.ci/badge/github/iza-institute-of-labor-economics/gettsim/main.svg)](https://results.pre-commit.ci/latest/github/iza-institute-of-labor-economics/gettsim/main)
-[![image](https://img.shields.io/github/contributors/iza-institute-of-labor-economics/gettsim.svg)](https://github.com/iza-institute-of-labor-economics/gettsim/graphs/contributors)
+[![pre-commit.ci status](https://results.pre-commit.ci/badge/github/ttsim-dev/gettsim/main.svg)](https://results.pre-commit.ci/latest/github/ttsim-dev/gettsim/main)
+[![image](https://img.shields.io/github/contributors/ttsim-dev/gettsim.svg)](https://github.com/ttsim-dev/gettsim/graphs/contributors)
 [![image](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
 [![image](https://img.shields.io/badge/zulip-join_chat-brightgreen.svg)](https://gettsim.zulipchat.com)
 
 <p align="center">
    <br>
    <br>
-   <a href="https://github.com/iza-institute-of-labor-economics/gettsim/">
+   <a href="https://github.com/ttsim-dev/gettsim/">
       <img src="docs/_static/images/gettsim_logo_text.png" width="800" alt="GETTSIM">
    </a>
    <br>

diff --git a/conftest.py b/conftest.py
@@ -3,7 +3,6 @@
 from typing import TYPE_CHECKING
 
 import pytest
-
 from ttsim.interface_dag_elements.backend import dnp as ttsim_dnp
 from ttsim.interface_dag_elements.backend import xnp as ttsim_xnp
 

diff --git a/docs/conf.py b/docs/conf.py
@@ -82,7 +82,7 @@
 extlinks = {
     "ghuser": ("https://github.com/%s", "@%s"),
     "gh": (
-        "https://github.com/iza-institute-of-labor-economics/gettsim/pull/%s",
+        "https://github.com/ttsim-dev/gettsim/pull/%s",
         "#%s",
     ),
 }
@@ -108,7 +108,7 @@
 html_logo = "_static/images/gettsim_logo.svg"
 
 html_theme_options = {
-    "github_url": "https://github.com/iza-institute-of-labor-economics/gettsim",
+    "github_url": "https://github.com/ttsim-dev/gettsim",
 }
 
 # Add any paths that contain custom static files (such as style sheets) here, relative

diff --git a/docs/geps/gep-00.md b/docs/geps/gep-00.md
@@ -239,14 +239,14 @@ This document has been placed in the public domain.
 
 [^id3]: This historical record is available by the normal git commands for retrieving older
     revisions, and can also be browsed on
-    [GitHub](https://github.com/iza-institute-of-labor-economics/gettsim/tree/main/docs/geps).
+    [GitHub](https://github.com/ttsim-dev/gettsim/tree/main/docs/geps).
 
 [^id4]: The URL for viewing GEPs on the web is
     <https://gettsim.readthedocs.io/en/latest/geps>.
 
 [#geps]: https://gettsim.zulipchat.com/#narrow/stream/309998-GEPs
-[github pull request]: https://github.com/iza-institute-of-labor-economics/gettsim/pulls
-[repository]: https://github.com/iza-institute-of-labor-economics/gettsim
+[github pull request]: https://github.com/ttsim-dev/gettsim/pulls
+[repository]: https://github.com/ttsim-dev/gettsim
 [restructuredtext]: http://docutils.sourceforge.net/rst.html
 [restructuredtextprimer]: http://www.sphinx-doc.org/en/stable/rest.html
 [sphinx]: http://www.sphinx-doc.org/en/stable/

diff --git a/docs/geps/gep-01.md b/docs/geps/gep-01.md
@@ -186,16 +186,16 @@ for that. Quoting from there:
 The below refers to older versions of the GEP; it has been updated because
 `GEP-6 <gep-6>` made much of the original content obsolete.
 
-- GitHub PR: <https://github.com/iza-institute-of-labor-economics/gettsim/pull/60>
+- GitHub PR: <https://github.com/ttsim-dev/gettsim/pull/60>
 - Discussion on provisional acceptance:
   <https://gettsim.zulipchat.com/#narrow/stream/309998-GEPs/topic/GEP.2001/near/189539859>
 - GitHub PR for first update (character limits, time and unit identifiers, DAG
-  adjustments): <https://github.com/iza-institute-of-labor-economics/gettsim/pull/312>
+  adjustments): <https://github.com/ttsim-dev/gettsim/pull/312>
 - GitHub PR for second update (concatenated column names, dealing with conflicting
   objectives, names for columns vs parameters):
-  <https://github.com/iza-institute-of-labor-economics/gettsim/pull/342>
+  <https://github.com/ttsim-dev/gettsim/pull/342>
 - GitHub PR for third update (changes because of `GEP-6 <gep-6>`):
-  <https://github.com/iza-institute-of-labor-economics/gettsim/pull/855>
+  <https://github.com/ttsim-dev/gettsim/pull/855>
 
 ## Copyright
 

diff --git a/docs/geps/gep-02.md b/docs/geps/gep-02.md
@@ -160,7 +160,7 @@ taxes and transfers became too difficult.
 - Zulip stream for
   [GEP 2](https://gettsim.zulipchat.com/#narrow/stream/309998-GEPs/topic/GEP.2001/near/189539859).
 - GitHub PR for update (changes because of `GEP-6 <gep-6>`):
-  <https://github.com/iza-institute-of-labor-economics/gettsim/pull/855>
+  <https://github.com/ttsim-dev/gettsim/pull/855>
 
 ## Copyright
 

diff --git a/docs/geps/gep-03.md b/docs/geps/gep-03.md
@@ -656,16 +656,16 @@ the parameter (see the previous section), the following types are possible:
 
 ## Discussion
 
-- <https://github.com/iza-institute-of-labor-economics/gettsim/pull/148>
+- <https://github.com/ttsim-dev/gettsim/pull/148>
 - <https://gettsim.zulipchat.com/#narrow/stream/309998-GEPs/topic/GEP.2003>
 - GitHub PR for update (changes because of `GEP-6 <gep-6>`):
-  <https://github.com/iza-institute-of-labor-economics/gettsim/pull/855>
+  <https://github.com/ttsim-dev/gettsim/pull/855>
 
 ## Copyright
 
 This document has been placed in the public domain.
 
 ## Appendix: json-schema for the yaml files
 
-```{literalinclude} ../../src/ttsim/params-schema.json
+```{literalinclude} ./params-schema.json
 ```
diff --git a/docs/geps/gep-04.md b/docs/geps/gep-04.md
@@ -232,7 +232,7 @@ For example, we may need the number of adult household members. The following co
 `household_characteristics.py` does this:
 
 ```python
-from ttsim import AggType, agg_by_group_function
+from gettsim.tt import AggType, agg_by_group_function
 
 
 @agg_by_group_function(agg_type=AggType.SUM)
@@ -273,7 +273,7 @@ a node `kindergeld__betrag_m_bg` containing the Bedarfsgemeinschaft-level sum of
 graph will be `kindergeld__betrag_m` and `bg_id`. This is the same as specifying:
 
 ```python
-from ttsim import AggType, agg_by_group_function
+from gettsim.tt import AggType, agg_by_group_function
 
 
 @agg_by_group_function(agg_type=AggType.SUM)
@@ -305,7 +305,7 @@ values in `source` should be ascribed to. The key `agg` gives the aggregation me
 For example, in the `kindergeld` namespace, we could have:
 
 ```python
-from ttsim import AggType, agg_by_p_id_function
+from gettsim.tt import AggType, agg_by_p_id_function
 
 
 @agg_by_p_id_function(agg_type=AggType.SUM)
@@ -370,10 +370,10 @@ computational advantages.
 
 ## Discussion
 
-- <https://github.com/iza-institute-of-labor-economics/gettsim/pull/178>
+- <https://github.com/ttsim-dev/gettsim/pull/178>
 - <https://gettsim.zulipchat.com/#narrow/stream/309998-GEPs/topic/GEP.2004>
 - GitHub PR for update (changes because of `GEP-6 <gep-6>`):
-  <https://github.com/iza-institute-of-labor-economics/gettsim/pull/855>
+  <https://github.com/ttsim-dev/gettsim/pull/855>
 
 ## Copyright
 

diff --git a/docs/geps/gep-05.md b/docs/geps/gep-05.md
@@ -50,7 +50,7 @@ The snippet is taken from `sozialversicherung/rente/grundrente/grundrente.py`, w
 contains the following code:
 
 ```python
-from ttsim import policy_function, RoundingSpec, RoundingDirection
+from gettsim.tt import policy_function, RoundingSpec, RoundingDirection
 
 
 @policy_function(
@@ -101,13 +101,12 @@ parameter files) for the following reason:
 ## Discussion
 
 - Zulip: <https://gettsim.zulipchat.com/#narrow/stream/309998-GEPs>
-- PR: <https://github.com/iza-institute-of-labor-economics/gettsim/pull/324>
-- PR Implementation:
-  <https://github.com/iza-institute-of-labor-economics/gettsim/pull/316>
+- PR: <https://github.com/ttsim-dev/gettsim/pull/324>
+- PR Implementation: <https://github.com/ttsim-dev/gettsim/pull/316>
 - GitHub PR for update (changes because of `GEP-6 <gep-6>`):
-  <https://github.com/iza-institute-of-labor-economics/gettsim/pull/855>
+  <https://github.com/ttsim-dev/gettsim/pull/855>
 - Github PR changing to a RoundingSpec class rather than parameters specified in the
-  yaml files: <https://github.com/iza-institute-of-labor-economics/gettsim/pull/854>
+  yaml files: <https://github.com/ttsim-dev/gettsim/pull/854>
 
 ## Copyright
 

diff --git a/docs/geps/gep-06.md b/docs/geps/gep-06.md
@@ -42,10 +42,10 @@ in at least three directions:
    sufficient context — in the examples above, those would be Arbeitslosengeld 2,
    Erziehungsgeld, and Kinderzuschlag.
 1. Handling functions that change over the years is not robust (examples in
-   [Issue 449](https://github.com/iza-institute-of-labor-economics/gettsim/issues/449)).
+   [Issue 449](https://github.com/ttsim-dev/gettsim/issues/449)).
 1. Parameters files do not handle cases well when functions expect parameters in a
    different form than the law specifies them (example:
-   [Issue 444](https://github.com/iza-institute-of-labor-economics/gettsim/issues/444)).
+   [Issue 444](https://github.com/ttsim-dev/gettsim/issues/444)).
 
 These issues severely limit the development of GETTSIM. We have been spending far too
 much time finding names that adhere to our self-imposed character limits. Functions with
@@ -264,17 +264,17 @@ There have been various discussions and preliminary implementations of some part
 this GEP:
 
 - Pull requests:
-  - [#787](https://github.com/iza-institute-of-labor-economics/gettsim/pulls/787) Model
-    classes for policy functions and policy environments
-  - [#720](https://github.com/iza-institute-of-labor-economics/gettsim/pulls/720)
-    Combined decorator for policy information,
-  - [#638](https://github.com/iza-institute-of-labor-economics/gettsim/pulls/638) Don’t
-    use functions in compute_taxes_and_transfers that are not active
-  - [#804](https://github.com/iza-institute-of-labor-economics/gettsim/pulls/804)
-    Namespaces for policy functions
+  - [#787](https://github.com/ttsim-dev/gettsim/pulls/787) Model classes for policy
+    functions and policy environments
+  - [#720](https://github.com/ttsim-dev/gettsim/pulls/720) Combined decorator for policy
+    information,
+  - [#638](https://github.com/ttsim-dev/gettsim/pulls/638) Don’t use functions in
+    compute_taxes_and_transfers that are not active
+  - [#804](https://github.com/ttsim-dev/gettsim/pulls/804) Namespaces for policy
+    functions
 - Issues:
-  - [#781](https://github.com/iza-institute-of-labor-economics/gettsim/issues/781):
-    Summary of interface discussion from 2024 GETTSIM workshop
+  - [#781](https://github.com/ttsim-dev/gettsim/issues/781): Summary of interface
+    discussion from 2024 GETTSIM workshop
 - [Zulip](https://gettsim.zulipchat.com/#narrow/channel/309998-GEPs/topic/GEP.2006)
 
 ## Copyright

diff --git a/docs/geps/gep-07.md b/docs/geps/gep-07.md
@@ -399,9 +399,8 @@ structure of GETTSIM described in [GEP 6](gep-06).
 
 ## Discussion
 
-- **ENH: Interface, 2024 edition · Issue #781 · iza-institute-of-labor-economics/gettsim
-  \- Part 1**.
-  [https://github.com](https://github.com/iza-institute-of-labor-economics/gettsim/issues/781)
+- **ENH: Interface, 2024 edition · Issue #781 · ttsim-dev/gettsim - Part 1**.
+  [https://github.com](https://github.com/ttsim-dev/gettsim/issues/781)
 
 ## Copyright
 

diff --git a/src/ttsim/params-schema.json → docs/geps/params-schema.json b/src/ttsim/params-schema.json → docs/geps/params-schema.json
@@ -1,4 +1,5 @@
 {
+  "$comment": "If you change this file, always change it in both locations:  1. ttsim/src/ttsim/params-schema.json  2. gettsim/docs/geps/params-schema.json",
   "$schema": "http://json-schema.org/draft-07/schema#",
   "type": "object",
   "patternProperties": {

diff --git a/docs/gettsim_developer/how-to-contribute.md b/docs/gettsim_developer/how-to-contribute.md
@@ -4,13 +4,13 @@ Contributions are always welcome. Everything ranging from small extensions of th
 documentation to implementing new features is appreciated. Of course, the bigger the
 change the more it is necessary to reach out to us in advance for an discussion. You can
 start an discussion by
-[posting an issue](https://github.com/iza-institute-of-labor-economics/gettsim/issues/new/choose)
-which can be a bug report or a feature request or something else.
+[posting an issue](https://github.com/ttsim-dev/gettsim/issues/new/choose) which can be
+a bug report or a feature request or something else.
 
 To get acquainted with the code base, you can also check out the
 [documentation](https://gettsim.readthedocs.io/en/latest/) or our
-[issue tracker](https://github.com/iza-institute-of-labor-economics/gettsim/issues) for
-some immediate and clearly defined tasks.
+[issue tracker](https://github.com/ttsim-dev/gettsim/issues) for some immediate and
+clearly defined tasks.
 
 To contribute to the project, adhere to the following process.
 
@@ -27,15 +27,13 @@ To contribute to the project, adhere to the following process.
   Thus, you can clone the repository directly using
 
   ```shell-session
-  $ git clone https://github.com/iza-institute-of-labor-economics/gettsim
+  $ git clone https://github.com/ttsim-dev/gettsim
   ```
 
   As a newcomer or infrequent contributor, you must first create a fork of GETTSIM which
   is a copy of the repository into your account where you have unlimited access. Go to
-  the
-  [Github page of GETTSIM](https://github.com/iza-institute-of-labor-economics/gettsim)
-  and click on the fork button in the upper right corner. Then, clone your fork onto
-  your disk with
+  the [Github page of GETTSIM](https://github.com/ttsim-dev/gettsim) and click on the
+  fork button in the upper right corner. Then, clone your fork onto your disk with
 
   ```shell-session
   $ git clone https://github.com/<user>/gettsim

diff --git a/docs/gettsim_developer/how-to-maintain.md b/docs/gettsim_developer/how-to-maintain.md
@@ -30,8 +30,8 @@ The branching model for GETTSIM is very simple.
 To release a new major or minor version of GETTSIM, do the following.
 
 1. To start the release process for any new version, e.g., `0.2`, first
-   [create a new milestone](https://github.com/iza-institute-of-labor-economics/gettsim/milestones/new)
-   on Github. Set the name to the version number (format is `v[major].[minor]`, in this
+   [create a new milestone](https://github.com/ttsim-dev/gettsim/milestones/new) on
+   Github. Set the name to the version number (format is `v[major].[minor]`, in this
    example: `v0.2`) to collect issues and PRs.
 
    A consensus among developers determines the scope of the new release. Note that
@@ -48,9 +48,8 @@ To release a new major or minor version of GETTSIM, do the following.
 
    1. Create a maintenance branch `[major].[minor]`, i.e., `0.2` in this example.
 
-1. Go to the
-   [page for releases](https://github.com/iza-institute-of-labor-economics/gettsim/releases)
-   and draft a new release.
+1. Go to the [page for releases](https://github.com/ttsim-dev/gettsim/releases) and
+   draft a new release.
 
    - Set both a new tag and the release title to `vX.Y.Z`.
    - Add the release notes. These should include the most important changes in a

diff --git a/docs/index.md b/docs/index.md
@@ -17,7 +17,7 @@ accomplish specific tasks with GETTSIM.
 caption: Links
 hidden: true
 ---
-gettsim on Github <https://github.com/iza-institute-of-labor-economics/gettsim>
+gettsim on Github <https://github.com/ttsim-dev/gettsim>
 ```
 
 ```{toctree}

diff --git a/outdated_docs/how-to-guides/calculating_elterngeld.ipynb b/outdated_docs/how-to-guides/calculating_elterngeld.ipynb
@@ -47,7 +47,7 @@
     "\n",
     "> **Note**: The Elterngeld implementation in GETTSIM does currently not consider income\n",
     "> from self-employment or other sources. See\n",
-    "> [this](https://github.com/iza-institute-of-labor-economics/gettsim/issues/613) issue.\n",
+    "> [this](https://github.com/ttsim-dev/gettsim/issues/613) issue.\n",
     "\n",
     "So let's assume that income from dependent employment is the only source of income. If\n",
     "you have only annual income data (and thus cannot compute gross income 12 months before\n",