  We present an analysis of the spin-down parameters for 131 radio pulsars for
which $\ddot\nu$ has been well determined. These pulsars have characteristic
ages ranging from $10^{3} - 10^{8}$ yr and spin periods in the range 0.4--30 s;
nearly equal numbers of pulsars have $\ddot\nu>0$ as $\ddot\nu<0$. We find a
strong correlation of $\ddot\nu$ with $\dot{\nu}$, {\em independent of the sign
of} $\ddot\nu$. We suggest that this trend can be accounted for by small,
stochastic deviations in the spin-down torque that are directly proportional
(in magnitude) to the spin-down torque.
