diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/aws.xml b/.idea/aws.xml
new file mode 100644
index 0000000..03f1bb6
--- /dev/null
+++ b/.idea/aws.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="accountSettings">
+    <option name="activeProfile" value="profile:default" />
+    <option name="activeRegion" value="us-east-1" />
+    <option name="recentlyUsedProfiles">
+      <list>
+        <option value="profile:default" />
+      </list>
+    </option>
+    <option name="recentlyUsedRegions">
+      <list>
+        <option value="us-east-1" />
+      </list>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/inspectionProfiles/profiles_settings.xml b/.idea/inspectionProfiles/profiles_settings.xml
new file mode 100644
index 0000000..105ce2d
--- /dev/null
+++ b/.idea/inspectionProfiles/profiles_settings.xml
@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..ab98567
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.7 (AWSPYDemo)" project-jdk-type="Python SDK" />
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..072e1dc
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/openfisca-us-data.iml" filepath="$PROJECT_DIR$/.idea/openfisca-us-data.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/openfisca-us-data.iml b/.idea/openfisca-us-data.iml
new file mode 100644
index 0000000..5fd47d3
--- /dev/null
+++ b/.idea/openfisca-us-data.iml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PYTHON_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="jdk" jdkName="Python 3.7 (AWSPYDemo)" jdkType="Python SDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+  <component name="PyDocumentationSettings">
+    <option name="format" value="GOOGLE" />
+    <option name="myDocStringFormat" value="Google" />
+  </component>
+  <component name="TestRunnerService">
+    <option name="PROJECT_TEST_RUNNER" value="py.test" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..94a25f7
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/README.md b/README.md
index 513b7a0..28e407b 100644
--- a/README.md
+++ b/README.md
@@ -116,3 +116,4 @@ class CustomDataset:
 ### ACS
 - OpenFisca-US-compatible
 - Contains OpenFisca-US-compatible input arrays.
+### hello world hello
\ No newline at end of file
diff --git a/openfisca_us_data/datasets/cps/cps.py b/openfisca_us_data/datasets/cps/cps.py
index a5e9982..0fd4215 100644
--- a/openfisca_us_data/datasets/cps/cps.py
+++ b/openfisca_us_data/datasets/cps/cps.py
@@ -40,7 +40,7 @@ def generate(year: int) -> None:
         add_personal_variables(cps, person)
         add_personal_income_variables(cps, person)
         add_SPM_variables(cps, spm_unit)
-
+        add_tax_unit_variables(cps, tax_unit)
         raw_data.close()
         cps.close()
 
@@ -121,7 +121,7 @@ def add_personal_income_variables(cps: h5py.File, person: DataFrame):
     cps["e02100"] = person.FRSE_VAL
     cps["e02400"] = person.SS_VAL
     cps["e02300"] = person.UC_VAL
-
+    cps["pencon"] = np.zeros(len(person.index), dtype=np.int32)
     # Pensions/annuities
     other_inc_type = person.OI_OFF
     cps["e01500"] = other_inc_type.isin((2, 13)) * person.OI_VAL
@@ -147,3 +147,6 @@ def add_SPM_variables(cps: h5py.File, spm_unit: DataFrame):
 
     for openfisca_variable, asec_variable in SPM_RENAMES.items():
         cps[openfisca_variable] = spm_unit[asec_variable]
+
+
+