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authorThibaut Horel <thibaut.horel@gmail.com>2012-11-05 16:04:20 +0100
committerThibaut Horel <thibaut.horel@gmail.com>2012-11-05 16:04:20 +0100
commitc29302b25adf190f98019eb8ce5f79b10b66d54d (patch)
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parent134ab1e3da0b83cfd332776c603178b43a091ba4 (diff)
downloadrecommendation-c29302b25adf190f98019eb8ce5f79b10b66d54d.tar.gz
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@@ -24,7 +24,7 @@ Our contributions are as follows.
We formulate the problem of experimental design subject to a given budget, in presence of strategic agents who specify their costs. In particular, we focus on linear regression. This is naturally viewed as a budget feasible mechanism design problem. We show that the objective function is sophisticated and related to the covariance of the $x_i$'s. In particular we formulate the {\em Experimental Design Problem} (\EDP) as follows: the experimenter \E\ wishes to find set $S$ of subjects to maximize
\begin{align}V(S) = \log\det(I_d+\sum_{i\in S}x_i\T{x_i}) \label{obj}\end{align}
with a budget constraint $\sum_{i\in S}c_i\leq B$, where $B$ is \E's budget. %, and other {\em strategic constraints} we don't list here.
- The objective function, which is the key, is motivated from the so-called $D$-objective criterion; in particular, it captures the reduction in the entropy of $\beta$ when the latter is learned through linear regression methods.
+ The objective function, which is the key, is motivated from the so-called $D$-optimality criterion; in particular, it captures the reduction in the entropy of $\beta$ when the latter is learned through linear regression methods.
\item
The above objective is submodular.