# ECN 100B: Intermediate Microeconomics

This is the second part of a two-quarter undergraduate sequence in intermediate microeconomics. Whereas ECN100A covers markets at their Smithian best, ECN100B digs into all their messy imperfections: monopoly, oligopoly, price discrimination, externalities, public goods, and problems of asymmetric information. It also introduces some handy tools—like game theory and the economics of uncertainty—that are used in many economics electives.

Here’s the syllabus, as taught in Fall 2019. I’ve posted all of the course materials below.

A word of thanks: I’m grateful to three teams of teaching assistants for giving feedback and catching errors in these files; to Anujit Chakraborty and Janine Wilson for many helpful conversations about pedagogy; and most of all to three cohorts of students whose excitement and curiosity made it a course worth teaching.

## Lecture notes

Lecture | Topic | |
---|---|---|

1 | Competitive markets | notes |

2 | Optimization | slides |

3 | Monopoly pricing | notes |

4 | Monopoly welfare | notes |

5 | Price discrimination | notes |

6 | Factor markets | notes |

7 | Static games: pure strategies | notes |

8 | Static games: mixed strategies | notes |

9 | Dynamic games | notes |

10 | Oligopoly | notes |

11 | Externalities | notes |

12 | Public goods | notes |

13 | Uncertainty | notes |

14 | Dealing with risk | notes |

15 | Asymmetric information | notes |

## Homework

If you’re using these materials for self-study, make sure to attempt the homework problems *before looking at the solutions*. You’ll get more out of these problems if you try to struggle through them yourself. The same applies to the TA problems and exams below.

Homework | Associated lecture topics | ||
---|---|---|---|

1 | Competitive markets, optimization | problems | solutions |

2 | Monopoly pricing, monopoly welfare | problems | solutions |

3 | Price discrimination, factor markets | problems | solutions |

4 | Static games, dynamic games | problems | solutions |

5 | Static games, dynamic games, oliogopoly | problems | solutions |

6 | Externalities, public goods | problems | solutions |

7 | Uncertainty, dealing with risk | problems | solutions |

## Practice problems from the TA sections

Section | Associated lecture topics | ||
---|---|---|---|

1 | Competitive markets, optimization | problems | solutions |

2 | Monopoly pricing, monopoly welfare | problems | solutions |

3 | Price discrimination, factor markets | problems | solutions |

4 | Static games, dynamic games | problems | solutions |

5 | Oliogopoly | problems | solutions |

6 | Externalities, public goods | problems | solutions |

7 | Public goods | problems | solutions |

8 | Uncertainty, dealing with risk | problems | solutions |

## Exams

I taught two separate sections, each of which got its own version of the midterms and final.

Exam | ||
---|---|---|

Midterm 1 (version A) | exam | solutions |

Midterm 1 (version B) | exam | solutions |

Midterm 2 (version A) | exam | solutions |

Midterm 2 (version B) | exam | solutions |

Final exam (version A) | exam | solutions |

Final exam (version B) | exam | solutions |

And lastly, here is a study guide for the final exam.