diff --git a/lectures/_toc.yml b/lectures/_toc.yml
index e914b5c31..e1a1eaaf2 100644
--- a/lectures/_toc.yml
+++ b/lectures/_toc.yml
@@ -5,9 +5,6 @@ parts:
   numbered: true
   chapters:
   - file: about
-  - file: long_run_growth
-  - file: business_cycle
-  - file: inequality
 - caption: Supply and Demand
   numbered: true
   chapters:
@@ -15,30 +12,60 @@ parts:
   - file: supply_demand_multiple_goods
   - file: supply_demand_heterogeneity
   - file: input_output
-- caption: Tools & Techniques
+- caption: Data and Measurement
+  numbered: true
+  chapters:
+  - file: long_run_growth
+  - file: business_cycle
+  - file: inflation_unemployment
+  - file: inequality
+  - file: distributions
+- caption: Useful Tools
   numbered: true
   chapters:
   - file: geom_series
-  - file: short_path
-  - file: scalar_dynam
   - file: linear_equations
-  - file: lp_intro
+- caption: Simulation
+  numbered: true
+  chapters:
   - file: lln_clt
   - file: monte_carlo
+  - file: schelling
+- caption: Dynamics
+  numbered: true
+  chapters:
+  - file: solow
+  - file: scalar_dynam
+  - file: cobweb
+  - file: olg
   - file: markov_chains
-- caption: Estimation
+- caption: Modeling in Higher Dimensions
   numbered: true
   chapters:
-  - file: simple_linear_regression
   - file: eigen
-- caption: Models
+  - file: lake_model
+  - file: asset_pricing
+  - file: networks
+  - file: samuelson
+- caption: Optimization
   numbered: true
   chapters:
-  - file: schelling
-  - file: solow
-  - file: cobweb
-  - file: lake_model
-  - file: olg
+  - file: lp_intro
+  - file: comparative_adv
+  - file: nonlinear
+  - file: short_path
+- caption: Markets and Competitive Equilibrium
+  numbered: true
+  chapters:
+  - file: markets_welfare
+  - file: risk
+  - file: uncertainty
+- caption: Estimation
+  numbered: true
+  chapters:
+  - file: simple_linear_regression
+  - file: lr_with_matrices
+  - file: mle
 - caption: Other
   numbered: true
   chapters:
diff --git a/lectures/asset_pricing.md b/lectures/asset_pricing.md
new file mode 100644
index 000000000..56120e47a
--- /dev/null
+++ b/lectures/asset_pricing.md
@@ -0,0 +1,14 @@
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+kernelspec:
+  display_name: Python 3
+  language: python
+  name: python3
+---
+
+# Introduction to Asset Pricing
+
+To be completed.
\ No newline at end of file
diff --git a/lectures/comparative_adv.md b/lectures/comparative_adv.md
new file mode 100644
index 000000000..65038de99
--- /dev/null
+++ b/lectures/comparative_adv.md
@@ -0,0 +1,14 @@
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+kernelspec:
+  display_name: Python 3
+  language: python
+  name: python3
+---
+
+# Comparative Advantage
+
+To be completed.
\ No newline at end of file
diff --git a/lectures/distributions.md b/lectures/distributions.md
new file mode 100644
index 000000000..b142b0b94
--- /dev/null
+++ b/lectures/distributions.md
@@ -0,0 +1,14 @@
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+kernelspec:
+  display_name: Python 3
+  language: python
+  name: python3
+---
+
+# Distributions in Economics
+
+To be completed.
\ No newline at end of file
diff --git a/lectures/inflation_unemployment.md b/lectures/inflation_unemployment.md
new file mode 100644
index 000000000..7e81e561b
--- /dev/null
+++ b/lectures/inflation_unemployment.md
@@ -0,0 +1,14 @@
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+kernelspec:
+  display_name: Python 3
+  language: python
+  name: python3
+---
+
+# Inflation and Unemployment
+
+To be completed.
\ No newline at end of file
diff --git a/lectures/lr_with_matrices.md b/lectures/lr_with_matrices.md
new file mode 100644
index 000000000..b890366fa
--- /dev/null
+++ b/lectures/lr_with_matrices.md
@@ -0,0 +1,14 @@
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+kernelspec:
+  display_name: Python 3
+  language: python
+  name: python3
+---
+
+# Linear Regression with Matrices
+
+To be completed.
\ No newline at end of file
diff --git a/lectures/markets_welfare.md b/lectures/markets_welfare.md
new file mode 100644
index 000000000..7887ae3d7
--- /dev/null
+++ b/lectures/markets_welfare.md
@@ -0,0 +1,14 @@
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+kernelspec:
+  display_name: Python 3
+  language: python
+  name: python3
+---
+
+# Markets and Welfare
+
+To be completed.
\ No newline at end of file
diff --git a/lectures/mle.md b/lectures/mle.md
new file mode 100644
index 000000000..4cc44b45f
--- /dev/null
+++ b/lectures/mle.md
@@ -0,0 +1,14 @@
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+kernelspec:
+  display_name: Python 3
+  language: python
+  name: python3
+---
+
+# Maximum Likelihood Estimation
+
+To be completed.
\ No newline at end of file
diff --git a/lectures/networks.md b/lectures/networks.md
new file mode 100644
index 000000000..7714c7c57
--- /dev/null
+++ b/lectures/networks.md
@@ -0,0 +1,14 @@
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+    format_version: 0.13
+    jupytext_version: 1.14.5
+kernelspec:
+  display_name: Python 3 (ipykernel)
+  language: python
+  name: python3
+---
+
+# Networks
\ No newline at end of file
diff --git a/lectures/nonlinear.md b/lectures/nonlinear.md
new file mode 100644
index 000000000..532371caf
--- /dev/null
+++ b/lectures/nonlinear.md
@@ -0,0 +1,14 @@
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+kernelspec:
+  display_name: Python 3
+  language: python
+  name: python3
+---
+
+# Nonlinear Problems
+
+To be completed.
\ No newline at end of file
diff --git a/lectures/risk.md b/lectures/risk.md
new file mode 100644
index 000000000..736df1132
--- /dev/null
+++ b/lectures/risk.md
@@ -0,0 +1,14 @@
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+kernelspec:
+  display_name: Python 3
+  language: python
+  name: python3
+---
+
+# Risk
+
+To be completed.
\ No newline at end of file
diff --git a/lectures/samuelson.md b/lectures/samuelson.md
new file mode 100644
index 000000000..36b3aa073
--- /dev/null
+++ b/lectures/samuelson.md
@@ -0,0 +1,14 @@
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+kernelspec:
+  display_name: Python 3
+  language: python
+  name: python3
+---
+
+# Multiplier Accelerator Model
+
+To be completed.
\ No newline at end of file
diff --git a/lectures/uncertainty.md b/lectures/uncertainty.md
new file mode 100644
index 000000000..7df29ddae
--- /dev/null
+++ b/lectures/uncertainty.md
@@ -0,0 +1,14 @@
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+kernelspec:
+  display_name: Python 3
+  language: python
+  name: python3
+---
+
+# Uncertainty
+
+To be completed.
\ No newline at end of file