diff --git a/Makefile b/Makefile
index 42189b692..c88251275 100644
--- a/Makefile
+++ b/Makefile
@@ -327,6 +327,17 @@ db-install:
 economy-db:  ## Import economics data (commodities, chains, gate links) into systems.db
 	@python3 tooling/economy-db/import_economics.py
 
+econ-sim:  ## Build the economics simulation binary (Layer 1+2: Leontief + tâtonnement trade)
+	@cargo build --manifest-path tooling/econ-sim/Cargo.toml --release
+	@echo "Built: tooling/econ-sim/target/release/econ-sim"
+
+econ-sim-run:  ## Run a quick economics simulation (100 ticks, output to /tmp/econ-sim.csv)
+	@tooling/econ-sim/target/release/econ-sim --ticks 100 --output /tmp/econ-sim.csv
+	@echo "Output: /tmp/econ-sim.csv"
+
+econ-sim-stability:  ## Run D-179 stability checks (Tests 1 and 2)
+	@tooling/econ-sim/target/release/econ-sim --stability-check
+
 # --- Decisions ---
 
 decisions-sync: