Designers often seek modular architectures to better accommodate expected changes and to enable parallel development. However, we lack a formal theory and model of modularity and software evolution, which can be used for description, prediction, and prescription. According to Baldwin and Clark's...

How do firms create and capture value in large technical systems? In this paper, I argue that the points of both value creation and value capture are the system's bottlenecks. Bottlenecks arise first as important technical problems to be solved. Once the problem is solved, the solution in...

In Chapter 2 we saw that the most economical locations for transactions in a task network are the so-called thin crossing points—places where transfers are easy to define, count and pay for. However, in many places in the task network, transfers of material, energy, and information are so...