This book is a collection of three independent essays on economic growth and learning. In the first essay, I present a characterization of undiscounted optimal transition dynamics in a two-sector optimal growth model with convex, non-differentiable technology sets. In the second essay, I investigate income disparity in China in the period 1978-2007. In the third essay, I analyze the economy with bounded-rational agents specializing in consumption and production for special goods and meet randomly over time based on Lagos-Wright type of monetary model.