My research is compiled in three filed and experimental essays: the first essay, explores the effects of windfall money on tax compliance and labour supply responses, exploring how and why people pay taxes, and how individual labour supply responds to non-labour income. The second paper tries to tease apart the dynamic effects of penalties/fines on firm tax compliance. The third paper focuses on punishment vs pro-social behaviour vis-à-vis the choice of public service delivery methods. The choices include a standard delivery system, fast track system with a higher premium and bribery option that’s risky and has a negative externality.