# Boundary conditions between different institutions affect how ideas move between them [[Heuretics evolve by moving between institutions]] — materials technologies are often born in academia, move to a startup, and then are taken up by a big company. The requirements from the institution that the heuretic would move into define the “boundary” conditions that it might go through. These boundary conditions are defined by institutional [[Structural Constraints]]. Heuretics can only make the transition when there is a continuous transition between the two institutions. Drastically different boundary conditions on each side of an institutional boundary cause [[Impedance mismatches]] — for example, many technologies are killed because startups can only move so slow and large companies can only move so fast. ### Related * [[Analogies]] * [[Storytelling Catalog — List of Analogies Proverbs and Stories]] * [[§Tech Tree Model of Heuretics]]