Truncated conditional expectation of multivariate normal distribution












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Assume that $y_1 = alpha_1 s_1 + u_1$ and $y_2 = alpha_2 s_1 + alpha_3 s_2 + alpha_4 u_1 + alpha_5 u_2$ where $s_1 sim N(0,Sigma_1)$, $s_2 sim N(0,Sigma_2)$, $u_1 sim N(0,sigma^2)$, $u_2 sim N(0,sigma^2)$ with the fact that they are all independently distributed. How can we calculate the following:



$E[s_1 | y_1, y_2, s_1>t]$.



I made the following progress and stuck with the last expression;
$E[s_1 | y_1, y_2, s_1>t] = int f(s_1|y_1, y_2, s_1 >t)s_1 ds_1 = int_{t}^{infty} s_1 f(s_1|y_1, y_2)ds_1$.



Can we get an expression, linear in $y_1$ and $y_2$, from the last expression?










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    0












    $begingroup$


    Assume that $y_1 = alpha_1 s_1 + u_1$ and $y_2 = alpha_2 s_1 + alpha_3 s_2 + alpha_4 u_1 + alpha_5 u_2$ where $s_1 sim N(0,Sigma_1)$, $s_2 sim N(0,Sigma_2)$, $u_1 sim N(0,sigma^2)$, $u_2 sim N(0,sigma^2)$ with the fact that they are all independently distributed. How can we calculate the following:



    $E[s_1 | y_1, y_2, s_1>t]$.



    I made the following progress and stuck with the last expression;
    $E[s_1 | y_1, y_2, s_1>t] = int f(s_1|y_1, y_2, s_1 >t)s_1 ds_1 = int_{t}^{infty} s_1 f(s_1|y_1, y_2)ds_1$.



    Can we get an expression, linear in $y_1$ and $y_2$, from the last expression?










    share|cite|improve this question









    $endgroup$















      0












      0








      0





      $begingroup$


      Assume that $y_1 = alpha_1 s_1 + u_1$ and $y_2 = alpha_2 s_1 + alpha_3 s_2 + alpha_4 u_1 + alpha_5 u_2$ where $s_1 sim N(0,Sigma_1)$, $s_2 sim N(0,Sigma_2)$, $u_1 sim N(0,sigma^2)$, $u_2 sim N(0,sigma^2)$ with the fact that they are all independently distributed. How can we calculate the following:



      $E[s_1 | y_1, y_2, s_1>t]$.



      I made the following progress and stuck with the last expression;
      $E[s_1 | y_1, y_2, s_1>t] = int f(s_1|y_1, y_2, s_1 >t)s_1 ds_1 = int_{t}^{infty} s_1 f(s_1|y_1, y_2)ds_1$.



      Can we get an expression, linear in $y_1$ and $y_2$, from the last expression?










      share|cite|improve this question









      $endgroup$




      Assume that $y_1 = alpha_1 s_1 + u_1$ and $y_2 = alpha_2 s_1 + alpha_3 s_2 + alpha_4 u_1 + alpha_5 u_2$ where $s_1 sim N(0,Sigma_1)$, $s_2 sim N(0,Sigma_2)$, $u_1 sim N(0,sigma^2)$, $u_2 sim N(0,sigma^2)$ with the fact that they are all independently distributed. How can we calculate the following:



      $E[s_1 | y_1, y_2, s_1>t]$.



      I made the following progress and stuck with the last expression;
      $E[s_1 | y_1, y_2, s_1>t] = int f(s_1|y_1, y_2, s_1 >t)s_1 ds_1 = int_{t}^{infty} s_1 f(s_1|y_1, y_2)ds_1$.



      Can we get an expression, linear in $y_1$ and $y_2$, from the last expression?







      probability probability-distributions conditional-expectation conditional-probability






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Jan 20 at 5:12









      user229519user229519

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