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caculate the implied cost of capital

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caculate the implied cost of capital

dai_yunhao
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Hello everybody,

I use the method which is found in the Statalist to caculate the implied cost of capital, but when I run the program, something wrong with the program.
The detail as follows:
 mata
------------------------------------------------- mata (type end to exit) ----------------------------------------------------
: v=J(1,1,.)

:
: st_view(v,., "x,price,b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,froe_1,froe_2 froe_3,froe_4,froe_5,froe_6,froe_7,froe_8,froe_9,f
> roe_10,froe_11,froe_12")

: function y(x,p,b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,f1,f2,f3,f4,f5,f6,f7,f8,f9,f10,f11,f12) {
>
> return(-p+b0+b0*(f1-x)/(1+x)+b1*(f2-x)/(1+x)^2+b2*(f3-x)/(1+x)^3+b3*(f4-x)/(1+x)^4+b4*(f5-x)/(1+x)^5+b5*(f6-x)/(1+x)^6+b6*(f
> 7-x)/(1+x)^7+b7*(f8-x)/(1+x)^8+b8*(f9-x)/(1+x)^9+b9*(f10-x)/(1+x)^10+b10*(f11-x)/(1+x)^11+b11*(f12-x)/((1+x)^11))
>
> }

: for (i=1;i<=rows(v);i++) {
>
> r=mm_root(x=.,&y(),0,1,1e-9,1000,v[i,2],v[i,3],v[i,4],v[i,5],v[i,6],v[i,7],v[i,8],v[i,9],v[i,10],v[i,11],v[i,12],v[i,13],v[i
> ,14],v[i,15],v[i,16],v[i,17],v[i,18],v[i,19],v[i,20],v[i,21],v[i,22],v[i,23],v[i,24],v[i,25],v[i,26])
>
> v[i,1]=x
>
> }
                 <istmt>:  3301  subscript invalid
r(3301);

could anybody tell me what's the problem and how to sovle the problem?
Thank you!
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