Search for dissertations about: "Per Fredrik Johansson"

Showing result 1 - 5 of 6 swedish dissertations containing the words Per Fredrik Johansson.

  2. 1. Essays on Measurement Error and Nonresponse

    Author : Fredrik Johansson; Anders Klevmarken; Per Johansson; Markus Jäntti; Uppsala universitet; []
    Keywords : Economics; Nationalekonomi;

    Abstract : Essay 1 deals with measurement errors. Matching survey data with administrative records provides unique opportunities to evaluate the statistical properties of respondents' answers. This paper focuses primarily on home ownership and wealth variables. READ MORE

  4. 2. What would have happened? : Four essays investigating causality

    Author : Fredrik Sävje; Eva Mörk; Per Johansson; Niklas Bengtsson; Kosuke Imai; Uppsala universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Nationalekonomi; Economics;

    Abstract : This dissertation consists of four self-contained essays.Essay 1. A common method to reduce the uncertainty of causal inferences from experiments is to assign treatments in fixed proportions within groups of similar units: blocking. READ MORE

  5. 3. A Shift in Urban Mobility and Parking? : Exploring Policies in Relation to Practices

    Author : Fredrik Johansson; Greger Henriksson; Jonas Åkerman; Pelle Envall; Greg Marsden; KTH; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Parking; mobility services; flexible parking requirements; sustainable mobility paradigm; Strategier för hållbar utveckling; Strategies for sustainable development;

    Abstract : The transport sector is associated with many environmental challenges, including carbon dioxide (CO2) emissions. Research indicate that CO2 emissions should decrease by at least 50 % per decade in order to be in line with the Paris Agreement, and the transport sector is highlighted as a particularly challenging sector. READ MORE

  6. 4. Probabilistic time estimation in tunnel projects

    Author : Mohammad Mohammadi; Johan Spross; Fredrik Johansson; Larsson Stefan; Anna Kadefors; Lars-Olof Dahlström; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cost overrun; Tunneling projects; Probabilistic approaches; time estimation; Kostnadsöverskridande; tunnelprojekt; sannolikhetsmetoder; tidsuppskattning; Soil and Rock Mechanics; Jord- och bergmekanik;

    Abstract : Transport infrastructure projects, including tunneling, suffer from timedelays and cost overrun. A literature review shows that the effect ofuncertainty has been neglected in explaining time and cost overrunmeaning that technical explanations matter. READ MORE

  7. 5. Factors Influencing the Yield of Mutations Induced by Polycyclic Aromatic Hydrocarbons in Mammalian Cells

    Author : Anne Lagerqvist; Dag Jenssen; Klaus Erixon; Fredrik Johansson; Hanspeter Naegeli; Stockholms universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Toxicology; Toxikologi; toxikologisk genetik; Toxicological Genetics;

    Abstract : Environmental contaminants are ubiquitously present in the urban environment, this has the implication that humans are exposed to toxic and carcinogenic chemicals. Polycyclic aromatic hydrocarbons (PAH) are one type of environmental contaminants, which are produced by combustion of organic compounds. READ MORE