Here is his personal favorite essay in which he discusses the successes and failures of the Soviet Space Program:
Into the Stars: A Look at the Soviet Space Program
Expedia Group valuation including a ratio analysis, intrinsic valuation, and discounted cash flow:
Expedia Group, Inc. Valuation
A fully functional financial model built from scratch for a forthcoming film, covering revenue projections, cost breakdowns, and return analysis:
Greenlight Financial Model