Discussion: Heterogeneity and soil element testing

Testing for Essential Heterogeneity∗

This paper examines the properties of instrumental variables (IV) applied to models with essential heterogeneity, that is, models where responses to interventions are heterogeneous and agents adopt treatments (participate in programs) with at least partial knowledge of their idiosyncratic response. We present several empirical examples demonstrating the importance of unobserved heterogeneity in...

Modal Testing and Finite Element Analysis of Crack Effects on Turbine Blades

The study of vibration response of a turbine blade helps to detect the crack presence in the blade which alters its dynamic characteristics. The change is characterized by changes in the modal parameters associated with natural frequencies. In this paper, study of vibration response is made for turbine blade in the presence of a crack like defect. Turbine blade is initially assumed as a cantile...

Sustainable practices to limit soil erosion: a review and discussion

How the review was carried out is briefly described. The review looks mainly at the literature published since year 2000, but does not exclude earlier publications. The sustainability of practices to limit erosion must be assessed not only in terms of the soil resource and the wider environment but must also take into account economical and socio-political factors. Soil degradation may be due t...

A Discussion of Asbestos Detection Techniques for Air and Soil

Discussion of “Multiple Testing for Exploratory Research”

I want to congratulate the authors on this thought-provoking and important paper on multiple testing in exploratory settings. Standard Multiple Testing procedures can appear very mechanistic. Hypotheses are ordered by increasing p-value. Given a type I error criterion, the Multiple Testing procedure selects a cut-off in this list. Simply working down the list of hypotheses in order of their p-v...