  The standard probability law on the set $S(x,y)$ of $y$-friable integers not
exceeding $x$ assigns to each friable integer $n$ a probability proportional to
$1/n^\alpha$ where $\alpha=\alpha(x,y)$ is the saddle-point of the inverse
Laplace integral for $\Psi(x,y):=|S(x,y)|$. This law presents a structural bias
inasmuch it weights integers $>x$. We propose a quantitative measure of this
bias and exhibit a related Gaussian distribution.
