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  • Panel Threshold Regression

    Hi everyone,
    I am trying to run a panel threshold regression to check the effect of financial inclusion on Economic growth.
    I have used PCA to construct and index, and run the regression for a sample of developed and developing countries.

    . xthreg GDPpcg FII inf pop to, qx(FII) rx(fd)
    Estimating the threshold parameters: 1st ...... Done

    Threshold estimator (level = 95):
    -----------------------------------------------------
    model | Threshold Lower Upper
    -----------+-----------------------------------------
    Th-1 | 0.8114 0.7757 0.9768
    -----------------------------------------------------

    Fixed-effects (within) regression Number of obs = 106
    Group variable: country_id Number of groups = 53

    R-squared: Obs per group:
    Within = 0.6199 min = 2
    Between = 0.2762 avg = 2.0
    Overall = 0.1945 max = 2

    F(6, 47) = 12.77
    corr(u_i, Xb) = -0.9807 Prob > F = 0.0000

    ------------------------------------------------------------------------------
    GDPpcg | Coefficient Std. err. t P>|t| [95% conf. interval]
    -------------+----------------------------------------------------------------
    FII | 1.795848 .5170819 3.47 0.001 .7556137 2.836083
    inf | -.0262133 .1141041 -0.23 0.819 -.2557612 .2033346
    pop | -2.115352 .5620811 -3.76 0.000 -3.246113 -.9845907
    to | .2148181 .0648698 3.31 0.002 .0843169 .3453193
    |
    _cat#c.fd |
    0 | .0119328 .0220283 0.54 0.591 -.0323825 .0562481
    1 | -.0189764 .0246487 -0.77 0.445 -.0685633 .0306104
    |
    _cons | -13.0959 6.316101 -2.07 0.044 -25.80226 -.3895464
    -------------+----------------------------------------------------------------
    sigma_u | 13.138957
    sigma_e | 2.1043823
    rho | .97498921 (fraction of variance due to u_i)
    ------------------------------------------------------------------------------
    F test that all u_i=0: F(52, 47) = 2.56 Prob > F = 0.0007

    I am however having two problems:

    1. When i try to split the sample to run the regression on the developed and developing countries separately its throwing an error.

    . keep if classification == "developed"
    (38 observations deleted)

    . br

    . xthreg GDPpcg FII inf pop to, qx(FII) rx(fd)
    thestm(): 3301 subscript invalid
    <istmt>: - function returned error
    r(3301);



    2. I am unable to use the financial inclusion Index as the threshold AND regime variable

    . xthreg GDPpcg FII inf pop to, qx(FII) rx(FII)
    Estimating the threshold parameters: 1st ...... thest(): 3200 conformability error
    thestm(): - function returned error
    <istmt>: - function returned error
    r(3200);


    Can someone please explain how i can fix this. It is essential for me to do a comparative analysis between the groups.
    Thank you
    Last edited by Kruthi Raj; 10 Aug 2024, 06:11.
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