diff --git a/config/greyhound.cf.json b/config/greyhound.cf.json
index 0fa7183..813a4e1 100644
--- a/config/greyhound.cf.json
+++ b/config/greyhound.cf.json
@@ -39,7 +39,7 @@
           3
         ]
       },
-      "ZeroIntercept"
+      "Origin"
     ],
     "coefficients": [
       1.3556904676344945,
@@ -91,7 +91,7 @@
           3
         ]
       },
-      "ZeroIntercept"
+      "Origin"
     ],
     "coefficients": [
       0.9802565411251424,
@@ -143,7 +143,7 @@
           3
         ]
       },
-      "ZeroIntercept"
+      "Origin"
     ],
     "coefficients": [
       0.9789334447029333,
diff --git a/config/greyhound.r.json b/config/greyhound.r.json
index 9b0aea8..51f0ee3 100644
--- a/config/greyhound.r.json
+++ b/config/greyhound.r.json
@@ -6,7 +6,7 @@
     { "Ordinal": "ActiveRunners" },
     { "Exp": [{ "Ordinal": "ActiveRunners" }, 2]},
     { "Exp": [{ "Ordinal": "ActiveRunners" }, 3]},
-    "ZeroIntercept"
+    "Origin"
   ],
   "w2": [
     { "Ordinal": "Weight0" },
@@ -15,7 +15,7 @@
     { "Ordinal": "ActiveRunners" },
     { "Exp": [{ "Ordinal": "ActiveRunners" }, 2]},
     { "Exp": [{ "Ordinal": "ActiveRunners" }, 3]},
-    "ZeroIntercept"
+    "Origin"
   ],
   "w3": [
     { "Ordinal": "Weight0" },
@@ -24,6 +24,6 @@
     { "Ordinal": "ActiveRunners" },
     { "Exp": [{ "Ordinal": "ActiveRunners" }, 2]},
     { "Exp": [{ "Ordinal": "ActiveRunners" }, 3]},
-    "ZeroIntercept"
+    "Origin"
   ]
 }
\ No newline at end of file
diff --git a/config/thoroughbred.cf.json b/config/thoroughbred.cf.json
index 1abc162..585ef62 100644
--- a/config/thoroughbred.cf.json
+++ b/config/thoroughbred.cf.json
@@ -39,7 +39,7 @@
           3
         ]
       },
-      "ZeroIntercept"
+      "Origin"
     ],
     "coefficients": [
       1.4714802210953573,
@@ -91,7 +91,7 @@
           3
         ]
       },
-      "ZeroIntercept"
+      "Origin"
     ],
     "coefficients": [
       1.2069350824699938,
@@ -143,7 +143,7 @@
           3
         ]
       },
-      "ZeroIntercept"
+      "Origin"
     ],
     "coefficients": [
       1.2428287117834143,
diff --git a/config/thoroughbred.r.json b/config/thoroughbred.r.json
index 9b0aea8..51f0ee3 100644
--- a/config/thoroughbred.r.json
+++ b/config/thoroughbred.r.json
@@ -6,7 +6,7 @@
     { "Ordinal": "ActiveRunners" },
     { "Exp": [{ "Ordinal": "ActiveRunners" }, 2]},
     { "Exp": [{ "Ordinal": "ActiveRunners" }, 3]},
-    "ZeroIntercept"
+    "Origin"
   ],
   "w2": [
     { "Ordinal": "Weight0" },
@@ -15,7 +15,7 @@
     { "Ordinal": "ActiveRunners" },
     { "Exp": [{ "Ordinal": "ActiveRunners" }, 2]},
     { "Exp": [{ "Ordinal": "ActiveRunners" }, 3]},
-    "ZeroIntercept"
+    "Origin"
   ],
   "w3": [
     { "Ordinal": "Weight0" },
@@ -24,6 +24,6 @@
     { "Ordinal": "ActiveRunners" },
     { "Exp": [{ "Ordinal": "ActiveRunners" }, 2]},
     { "Exp": [{ "Ordinal": "ActiveRunners" }, 3]},
-    "ZeroIntercept"
+    "Origin"
   ]
 }
\ No newline at end of file
diff --git a/src/linear/regression.rs b/src/linear/regression.rs
index aa24331..0b31a75 100644
--- a/src/linear/regression.rs
+++ b/src/linear/regression.rs
@@ -24,7 +24,7 @@ pub enum Regressor<O: AsIndex> {
     Exp(Box<Regressor<O>>, i32),
     Product(Vec<Regressor<O>>),
     Intercept,
-    ZeroIntercept,
+    Origin,
 }
 impl<O: AsIndex> Regressor<O> {
     pub fn resolve(&self, input: &[f64]) -> f64 {
@@ -36,12 +36,12 @@ impl<O: AsIndex> Regressor<O> {
                 .map(|regressor| regressor.resolve(input))
                 .product(),
             Regressor::Intercept => 1.,
-            Regressor::ZeroIntercept => 0.,
+            Regressor::Origin => 0.,
         }
     }
 
     pub fn is_constant(&self) -> bool {
-        matches!(self, Regressor::Intercept | Regressor::ZeroIntercept)
+        matches!(self, Regressor::Intercept | Regressor::Origin)
     }
 }
 
@@ -102,7 +102,7 @@ impl<O: AsIndex> Predictor<O> {
         let has_zero_intercept = self
             .regressors
             .iter()
-            .any(|regressor| matches!(regressor, Regressor::ZeroIntercept));
+            .any(|regressor| matches!(regressor, Regressor::Origin));
 
         let df_residual;
         let df_total;
@@ -150,7 +150,7 @@ pub(crate) fn validate_regressors<O: AsIndex>(
         bail!(
             "must specify exactly one {} or {} regressor",
             Regressor::<DummyOrdinal>::Intercept.to_string(),
-            Regressor::<DummyOrdinal>::ZeroIntercept.to_string()
+            Regressor::<DummyOrdinal>::Origin.to_string()
         );
     }
     Ok(())
diff --git a/src/linear/regression/tests.rs b/src/linear/regression/tests.rs
index ac86879..01c0292 100644
--- a/src/linear/regression/tests.rs
+++ b/src/linear/regression/tests.rs
@@ -3,7 +3,7 @@ use ordinalizer::Ordinal;
 
 use Regressor::{Exp, Ordinal, Product};
 
-use crate::linear::regression::Regressor::{Intercept, ZeroIntercept};
+use crate::linear::regression::Regressor::{Intercept, Origin};
 use crate::testing::assert_slice_f64_relative;
 
 use super::*;
@@ -59,9 +59,9 @@ fn serde_json() {
         assert_eq!(r, rr);
     }
     {
-        let r = ZeroIntercept;
+        let r = Origin;
         let json = to_json(&r);
-        assert_eq!(r#""ZeroIntercept""#, json);
+        assert_eq!(r#""Origin""#, json);
         let rr = from_json(&json);
         assert_eq!(r, rr);
     }
@@ -129,7 +129,7 @@ fn regression_data_1() {
     }
     {
         // without intercept
-        let model = RegressionModel::fit(Factor::Y, vec![ZeroIntercept, Ordinal(Factor::X)], &data)
+        let model = RegressionModel::fit(Factor::Y, vec![Origin, Ordinal(Factor::X)], &data)
             .unwrap();
         assert_slice_f64_relative(
             &model.predictor.coefficients,
@@ -231,7 +231,7 @@ fn regression_data_1() {
         // with multiple distinct regressors and no intercept
         let model = RegressionModel::fit(
             Factor::Y,
-            vec![ZeroIntercept, Ordinal(Factor::X), Ordinal(Factor::W)],
+            vec![Origin, Ordinal(Factor::X), Ordinal(Factor::W)],
             &data,
         )
         .unwrap();
@@ -268,7 +268,7 @@ fn regression_data_1() {
         let model = RegressionModel::fit(
             Factor::Y,
             vec![
-                ZeroIntercept,
+                Origin,
                 Product(vec![Ordinal(Factor::X), Ordinal(Factor::W)]),
             ],
             &data,
@@ -361,7 +361,7 @@ fn regression_data_2() {
     }
     {
         // without intercept
-        let model = RegressionModel::fit(Factor::Y, vec![ZeroIntercept, Ordinal(Factor::X)], &data)
+        let model = RegressionModel::fit(Factor::Y, vec![Origin, Ordinal(Factor::X)], &data)
             .unwrap();
         assert_slice_f64_relative(
             &model.predictor.coefficients,
@@ -423,7 +423,7 @@ fn regression_data_2() {
         // with multiple distinct regressors and no intercept
         let model = RegressionModel::fit(
             Factor::Y,
-            vec![ZeroIntercept, Ordinal(Factor::X), Ordinal(Factor::W)],
+            vec![Origin, Ordinal(Factor::X), Ordinal(Factor::W)],
             &data,
         )
         .unwrap();