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  • Pannel Data and Fractional Models

    I have the folllowing models:

    fmlogit dropout change stay, eta(perc_female perc_Parent_HE matric1op ent_int ent_rga ent_m23 i.sector i.field_study i.estab)
    margins, dydx(*)
    and

    fracreg logit delayed perc_female perc_Parent_HE matric1op ent_int ent_rga ent_m23 i.sector i.field_study i.estab
    margins, dydx(*)


    However, I want to examine the impact of the covid years through a panel. I have done interactions with all the variables and a dummy for covid years. Yet the results are not great, my coefficients don't change much:

    Multinominal Fractional Logit
    (1)
    Multinominal Fractional Logit
    (2)
    Dependent variable: Dropout Transfer Stay Dropout Transfer Stay
    Prop Female - .0475***
    (.01)
    - .0339***
    (.00)
    .0814***
    (.01)
    - .0469***
    (.01)
    - .0345***
    (.01)
    .0814***
    (.01)
    Prop Parent HE - .0826***
    (.01)
    - .0011
    (.01)
    .0814***
    (.01)
    - .0860***
    (.01)
    .0066
    (.01)
    .0793***
    (.01)
    Enrolled 1st op - .0214***
    (.00)
    - .1108***
    (.01)
    .1322***
    (.01)
    - .0208***
    (.00)
    - .1133***
    (.01)
    .1341***
    (.01)
    Entry Internationals .1406***
    (.01)
    .0185
    (.02)
    - .1591***
    (.02)
    .1112***
    (.01)
    .0182
    (.02)
    - .1302***
    (.02)
    Entry General - .1099***
    (.01)
    .0555***
    (.01)
    .0544***
    (.02)
    - .1055***
    (.01)
    .0525***
    (.01)
    .0530***
    (.02)
    Entry >23 .0751***
    (.01)
    - .0071
    (.02)
    - .0679***
    (.03)
    .0720***
    (.01)
    - .0038
    (.02)
    - .0683**
    (.03)
    Sector .0016
    (.00)
    - .0176*
    (.01)
    .0160
    (.01)
    .0011
    (.00)
    - .0174*
    (.01)
    .0163
    (.01)
    Covid .0135***
    (.00)
    - .0042*
    (.00)
    - .0092**
    (.00)
    N 8.054 8.054
    Yes
    Yes
    Institution Fixed Effects Yes
    Field of Study Fixed Effects Yes
    Labels: Models (1) Multinominal Fractional Logit Model with control variables, (2) Multinominal Fractional Logit Model with control variables interacted with COVID-19 years (2019 – 2021)
    Notes: t statistics in parentheses. Significance levels: * p<0.05, ** p<0.01, *** p<0.001
    Source: Created by the authors.
    Fractional Logit
    (1)
    Fractional Logit
    (2)
    Dependent variable: Delayed Completion Delayed Completion
    Prop Female - .2816***
    (.02)
    - 0.2800***
    (.02)
    Prop Parent HE - .1973***
    (.02)
    - .1868***
    (.02)
    Enrolled 1st op - .1633***
    (.01)
    - .1685***
    (.02)
    Entry Internationals .0940**
    (.03)
    .0881*
    (.04)
    Entry General - .1269***
    (.02)
    - .1253***
    (.02)
    Entry >23 .0765**
    (.04)
    .0768*
    (.04)
    Sector - .0138
    (.02)
    - .0135
    (.02)
    Covid - .0350***
    (.01)
    N 6.078 6.078
    Institution Fixed Effects Yes Yes
    Field of Study Fixed Effects Yes Yes
    Labels: Models (1) Fractional Logit Model with control variables, (2) Fractional Logit Model with control variables interacted with COVID-19 years (2019 – 2021)
    Notes: t statistics in parentheses. Significance levels: * p<0.1, ** p<0.01, *** p<0.001
    Source: Created by the authors.


    Now I would like to try the work achieved by Papke, L.E. and J.M. Wooldridge (2008). Except I am not sure I could adapt the code provided in this paper.

    Can you please help me how to get the marginal average effects from the adapted GLM model, as studied in the same work.
    Also if you have any insights on how to improve my work, would be highly appreciated.

    Thanks a lot
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