This time we are looking on the **crossword puzzle clue** for: *Certain.*

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## Possible Answers:
**SURE**.

**SURE**.

Last seen on: –The Telegraph – QUICK CROSSWORD NO: 29,983 – May 10 2022s

–Universal Crossword – Dec 8 2021

–The Telegraph – QUICK CROSSWORD NO: 701 – Oct 31 2021

–The Telegraph – QUICK CROSSWORD NO: 29,481 – Sep 29 2020

The Telegraph – QUICK CROSSWORD NO: 29,464 – Sep 9 2020

### Random information on the term “Certain”:

Epistemology is the branch of philosophy that studies the nature, scope, and limitations of knowledge.

This category has the following 22 subcategories, out of 22 total.

The following 200 pages are in this category, out of approximately 225 total. This list may not reflect recent changes (learn more).

### Random information on the term “SURE”:

In econometrics, the seemingly unrelated regressions (SUR):306:279:332 or seemingly unrelated regression equations (SURE):2 model, proposed by Arnold Zellner in (1962), is a generalization of a linear regression model that consists of several regression equations, each having its own dependent variable and potentially different sets of exogenous explanatory variables. Each equation is a valid linear regression on its own and can be estimated separately, which is why the system is called seemingly unrelated,:332 although some authors suggest that the term seemingly related would be more appropriate,:306 since the error terms are assumed to be correlated across the equations.

The model can be estimated equation-by-equation using standard ordinary least squares (OLS). Such estimates are consistent, however generally not as efficient as the SUR method, which amounts to feasible generalized least squares with a specific form of the variance-covariance matrix. Two important cases when SUR is in fact equivalent to OLS are when the error terms are in fact uncorrelated between the equations (so that they are truly unrelated) and when each equation contains exactly the same set of regressors on the right-hand-side.