Chapter 1 General introduction Chapter 2 Professional views on valuation practice Chapter 3 Research orientation Chapter 4 Research bias in judgement bias studies -a systematic review of valuation judgement literature Chapter 5 Complexity in valuation practice: an inquiry into valuers' perceptions of task complexity in the Dutch real estate market Chapter 6 How client attachment affects information verification in commercial valuation practice Chapter 7 The ideal type of valuer: Expert, Service Provider or Reporter An investigation into prevailing role types in commercial valuation Chapter 8 Role orientation of Dutch valuation practitioners: balanced or biased?