The phrase "persistent deviation" is correct and usable in written English.
It can be used to describe an ongoing, habitual divergence from what is expected, typical, or normal. For example, "The persistent deviation in his behavior raised concerns among his colleagues."
Many economists regard a recession as the "persistent deviation" from full employment and growth, says Professor Ritschl.
Because neither the dynamo equations nor the geometry of planetary outer cores contain any special longitude, any persistent deviation of a dynamo property from axisymmetry can only be explained by boundary heterogeneity.
However, there is no preferred hemisphere (neither in the dynamo equations nor in the geometry of planetary outer cores), so any persistent deviation of a dynamo property from equatorial symmetry may also require boundary heterogeneity.
The remainder of the patients experienced either persistent (n = 15, 7.6%) or recurrently persistent deviation (n = 75, 37.9%).
Pattern of deviations were characterized into five major categories: no deviations, temporary-occasional (deviation at just one clinic visit), temporary-relapsing (more than one deviation but not at consecutive clinic visit), persistent-occasional (deviation at more than one consecutive clinic visits occurring once) and persistent-relapsing (persistent deviation occurring more than once).
But there are some persistent deviations from PPP.
With the government's preferred measure of annual cost of living increases currently standing at 4.5%, the OECD said the public's belief that inflation would remain high illustrated "concerns about the Bank of England's willingness to tolerate significant and persistent deviations" from the government's 2% target.
Fuel prices are per se volatile, but exchange rates independently add volatility since they tend to "overshoot" equilibrium in the short run and often exhibit persistent deviations from long-run equilibrium.
Notice that after 1975, Spain has experienced large and persistent deviations from a balanced growth path since the growth in GDP per working-age person differs from that in the productivity factor, and the capital and labor factors are not constant.
Deviations due to comorbidity, toxicity or patient-related factors were more likely to have persistent deviations, whilst physician-related factors did not differ between temporary and persistent deviations.
Therefore it is hypothesised, that in the era of antiretroviral therapy the incidence of anogenital cancer in HIV-positive patients will increase as consequence of prolonging survival combined with persistent deviations of the immune system.
