@article{park_goodwin_zheng_rejesus_2020, title={Contract elements, growing conditions, and anomalous claims behaviour in US crop insurance}, volume={45}, ISSN={["1468-0440"]}, DOI={10.1057/s41288-019-00143-9}, abstractNote={We investigate contract elements and growing conditions associated with anomalous claims behaviour in the U.S. Federal Crop Insurance Program. In this study the measure of “anomalous claims behaviour” is based on the number of producers (in a county) placed on the “Spot Check List” (SCL)—a list generated from government compliance efforts that aim to detect and deter fraud, waste, and abuse in the U.S. Federal Crop Insurance Program. Using county-level data and various econometric approaches that control for features of this data set (e.g., the count nature of the dependent variable, censoring, potential endogeneity, and spatial/temporal dependence), we find that the following crop insurance contract attributes influence the extent of anomalous claims behaviour in a county: (a) the ability to insure individual fields through “optional units”; (b) the coverage level choice; and (c) the total number of acres insured. In addition, our empirical analyses suggest that anomalous claims behaviour significantly increases when extreme weather events occur (e.g., droughts, floods) and when economic conditions are unfavourable (i.e., high input costs that lower profit levels). Results from this study have important implications for addressing potential underwriting vulnerabilities in crop insurance contracts and the frequency of more rigorous compliance inspections.}, number={1}, journal={GENEVA PAPERS ON RISK AND INSURANCE-ISSUES AND PRACTICE}, author={Park, Sungkwol and Goodwin, Barry K. and Zheng, Xiaoyong and Rejesus, Roderick M.}, year={2020}, month={Jan}, pages={157–183} }
 @article{park_pour-ghaz_2018, title={What is the role of water in the geopolymerization of metakaolin?}, volume={182}, ISSN={["1879-0526"]}, DOI={10.1016/j.conbuildmat.2018.06.073}, abstractNote={Despite the significant advances in understanding the structure of geopolymers in the last decades, the role of water in the geopolymerization of aluminosilicates and within the structure of geopolymers remains elusive. The present paper investigates the role of water in the geopolymerization of metakaolin, a low calcium aluminosilicate. We differentiate between different states of water in these materials and discuss the nature and the origin of non-evaporable (chemically bound) water, and evaporable water. We propose a conceptual model for the microstructure of metakaolin based geopolymers that accounts for different states of water within their structure and discuss the implications of their composition on pore size distribution.}, journal={CONSTRUCTION AND BUILDING MATERIALS}, author={Park, Sungwoo and Pour-Ghaz, Mohammad}, year={2018}, month={Sep}, pages={360–370} }