Price and product mix decisions under different cost systems Philipp Plank analyses the question what drives the quality of cost systems and is the quality of cost systems directly and at best positively related to the firms performance. In other words is it worth investing in complex cost allocation systems or are there environmental and or production settings in which less enhanced systems perform adequately. Using simulations a benchmark firm (first best solution) perfectly allocating cost to products is compared to firms implementing heuristic cost allocation schemes (second best solution) to identify the profit gap resulting from decisions based on limited information. Into this discussion the idea of cost stickiness is integrated thereby indicating a new planning approach. Contents About the adequacy of full costing for decision making From cost system design to pricing and portfolio decisions About the adequacy of simulations in management accounting research A theory review of relevant simulation models in management accounting Price and product mix decisions under different cost systems Extended decision model incorporating cost stickiness Target Groups Academics and students in the fields of planning and accounting Practitioners in controlling The Author Philipp Plank received his doctoral degree from the University of Cologne under the supervision of Prof. Dr. C. Homburg. He now works as a project manager und data scientist