Missing factors, unmeasured confounders, and loss to follow-up can also lead to bias. The control output can be classified as measured, unmeasured, or unmonitored. This suggests that the market value reflects some unmeasured or unrecorded assets of the company. When speaking about topological redundancy we have to distinguish between measured and unmeasured variables. The application of MHE is generally to estimate measured or unmeasured states of dynamical systems. The anion gap is affected by changes in unmeasured ions. This may suggest the effect of an unmeasured variable. Cadenzas are most often in unmeasured rhythm, and so is recitative. The last unmeasured preludes for harpsichord date from the 1720s. His reputation as a composer comes mainly from his chaconnes, passacaglias and unmeasured preludes. The costs of policing and prosecuting welfare fraud are high, though largely unmeasured. Selling beer in unmeasured glasses without using some other form of calibrated measure is illegal. Unmeasured preludes for harpsichord started appearing around 1650. The first unmeasured preludes appeared during the Renaissance era. An EPA study had similar findings, but acknowledged that several kinds of benefits were unmeasured.