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    Carefully review the slides in pages 18 ~ 30, and run the following regression analyses

    1. Perceived quality
    Regress qua on nat_1m, loc_1m, and dig_1m, and interpret coefficients
    Regress qua on nat_1m, loc_1m, dig_1m, industry, and yrqtr, and interpret coefficients
    Discuss how control variables (industry and yrqtr) influenced advertising effectiveness coefficients

    2. Perceived value
    Regress val on nat_1m, loc_1m, and dig_1m, and interpret coefficients
    Regress val on nat_1m, loc_1m, dig_1m, industry, and yrqtr, and interpret coefficients
    Discuss how control variables (industry and yrqtr) influenced advertising effectiveness coefficients

    3. Satisfaction
    Regress sat on nat_1m, loc_1m, and dig_1m, and interpret coefficients
    Regress sat on nat_1m, loc_1m, dig_1m, industry, and yrqtr, and interpret coefficients
    Discuss how control variables (industry and yrqtr) influenced advertising effectiveness coefficients

    4. Repeat regressions in 1~3 with competitive advertising (compnat_1m, comploc_1m, and compdig_1m) and discuss how control variables help

    Note: Please attach screenshot of each work

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