This paper is concerned with the problem of representing the eeects of actions. We argue that the traditional minimal change principle is problematic to represent ramiications of actions that are related to the causality of the domain. To handle this problem properly, it is necessary to describe the causal relations of the domain explicitly and compile the domain causality into action theories....

International Crops Research Institute for the Semi-Arid Tropics' (ICRISAT) research strategy sorghum and millets is based on market-led development. We analyse construction of this Theory Change its application to Eastern Africa using evidence from Harnessing Opportunities Productivity Enhancement (HOPE) project. trace evolution market discourse in ICRISAT ask why became so influential. The sc...

C~vscsl theories are default theories which explicitly accommodate a distinction between ‘explained’ and ‘unexplained’ propositions. This is accomplished by means of an operator ‘C’ in the language for which propositions a! are assumed explained when literals of the form Car hold. The behavior of causal theories is determined by a preference relation on models based on the minimization of unexp...