Engsted, Tom; Pedersen, Thomas Q.; Tanggaard, Carsten - In: Journal of Banking & Finance 36 (2012) 5, pp. 1255-1265
We analyze the pitfalls involved in VAR based return decompositions. First, we show that recent criticism of such decompositions is misplaced and builds on invalid VAR models and erroneous interpretations. Second, we derive the requirements needed for VAR decompositions to be valid. A crucial...