Sökning: "Xijia Liu"

Hittade 2 avhandlingar innehållade orden Xijia Liu.

1. 1. On Non Parametric Regression and Panel Unit Root Testing

   Författare :Xijia Liu; Rolf Larsson; Johan Lyhagen; Niklas Ahlgren; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

   Sammanfattning : In this thesis, two different issues in econometrics are studied, the estimation of regression coefficients and the non-stationartiy analysis in a panel setting.Regarding the first topic, we study a set of measure of location-based estimators (MLBEs) for the slope parameter in a linear regression model with a single stochastic regressor. LÄS MER

3. 2. Circulating markers of risk and etiology in colorectal cancer

   Författare :Justin Harbs; Sophia Harlid; Bethany van Guelpen; Xijia Liu; Henrik Grönberg; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Colorectal cancer; CRC; sex hormones; colon cancer; DNA methylation; proteomics; risk; etiology; Cancer Epidemiology; cancerepidemiologi;

   Sammanfattning : Background: Colorectal cancer is the third most commonly diagnosed cancer in men and women. Worldwide around 2 million individuals are diagnosed each year – a number expected to increase as colorectal cancer risk factors become more prevalent. LÄS MER