diff --git a/MEV_by_chains/README.md b/MEV_by_chains/README.md
new file mode 100644
index 0000000..af4828d
--- /dev/null
+++ b/MEV_by_chains/README.md
@@ -0,0 +1,9 @@
+## mev on chains
+
+<br>
+
+### resources
+
+<br>
+
+- [mev on l2s, by ha et. al](https://timroughgarden.github.io/fob21/reports/r11.pdf)