Sökning: "generalized estimating equations"

Hittade 4 uppsatser innehållade orden generalized estimating equations.

  1. 1. Inverse probability weighted generalised estimating equations for longitudinal data

    Master-uppsats, Lunds universitet/Matematisk statistik

    Författare :Andrea Mattsson; [2021]
    Nyckelord :weighted generalised estimating equations; inverse probability weighting; longitudinal study; missing data; truncation by death; lung function; FEV1; Mathematics and Statistics;

    Sammanfattning : Longitudinal study designs, in which variables of interest are observed at multiple time points in a study population, are frequently used in clinical research. Missing data are common in these types of studies. Moreover, in studies investigating a population where the mortality rate is high, data can be truncated by death. LÄS MER

  3. 2. Modelling growth of Norway spruce on former agricultural lands in Latvia

    Master-uppsats, SLU/Southern Swedish Forest Research Centre

    Författare :Andis Zvirgzdiņš; [2019]
    Nyckelord :Norway spruce plantations; young stands; height development; generalized algebraic difference approach; growth simulations;

    Sammanfattning : Adequate growth forecasts are essential for forest management planning. In order to make such forecasts, accurate growth models are required. Due to the rapid growth of Norway spruce (L.) Karst. LÄS MER

  4. 3. The impact of high-frequency trading on the Swedish stock market – based on liquidity and volatility

    Magister-uppsats, Linköpings universitet/Nationalekonomi

    Författare :Jonas Björkman; Johan Durling; [2018]
    Nyckelord :High-frequency trading; HFT; liquidity; volatility; quality; Högfrekvenshandel; HFT; likviditet; volatilitet; kvalitet;

    Sammanfattning : This paper studies how high-frequency trading (HFT) affects the Swedish stock market quality based on volatility and liquidity measures. Previous studies show ambiguous results where a few propose that HFT deteriorates market quality by increasing volatility and decreasing liquidity while some studies point in the opposite direction. LÄS MER

  5. 4. Measuring the causal effect of air temperature on violent crime

    Kandidat-uppsats, Uppsala universitet/Statistiska institutionen

    Författare :Fabian Söderdahl; Karl Hammarström; [2015]
    Nyckelord :Causal inference; propensity score; inverse probability weighing; generalized estimating equations;

    Sammanfattning : This thesis aimed to apply the causal framework with potential outcomes to examine the causal effect of air temperature on reported violent crimes in Swedish municipalities. The Generalized Estimating Equations method was used on yearly, monthly and also July only data for the time period 2002-2014. LÄS MER