Table 1.

Parameter notations in the bi-level model.

Decision Maker	Notation	Meaning
Company	$W$	Set of work-life balance (WLB) components,$W=\left\{w_1,w_2\cdots ,w_{\mathrm{m}}\right\}$
	$P_1$	Set of company work plans, $P_1=\left\{p_1^1,p_2^1,\cdots p_{n_1}^1\right\}$
	$C_i$	Fixed monthly cost per candidate $i$
	$V_i$	Expected income of the company per candidate $i$
	$D$	Number of full-time jobs the company is proposing
	$C_w^v$	Variable cost per WLB component $w,w\in W$
	$C_p^F$	Fixed cost per work plan $p$ if opened, $p\in P_1$
	${\mu }_{\mathit{wp}}$	$\left\{\begin{array}{cc}1& \mathrm{i}\mathrm{f}\mathrm{w}\mathrm{o}\mathrm{r}\mathrm{k}\mathrm{l}\mathrm{i}\mathrm{f}\mathrm{e}\mathrm{c}\mathrm{o}\mathrm{m}\mathrm{p}\mathrm{o}\mathrm{n}\mathrm{e}\mathrm{n}\mathrm{t}w\mathrm{i}\mathrm{s}\mathrm{i}\mathrm{n}\mathrm{c}\mathrm{l}\mathrm{u}\mathrm{d}\mathrm{e}\mathrm{d}\mathrm{i}\mathrm{n}\mathrm{w}\mathrm{o}\mathrm{r}\mathrm{k}\mathrm{p}\mathrm{l}\mathrm{a}\mathrm{n}p,p\in P_1\\ 0& \mathrm{o}\mathrm{t}\mathrm{h}\mathrm{e}\mathrm{r}\mathrm{w}\mathrm{i}\mathrm{s}\mathrm{e}\end{array}\right)$
	$q_p$	WLB quality of work plan $p,p\in P_1$
Competitor	$P_2$	Set of competitor work plans, $P_2=\left\{p_1^2,p_2^2,\cdots {,p}_{n_2}^2\right\}$
	${\overline{t}}_p$	Monthly salary for work plan $p$ of the competitor for a full-time employee,$p\in P_2$
	${\overline{q}}_p$	WLB quality of work plan $p,p\in P_2$
Candidate	$I$	Set of potential candidates, $I=\left\{1,2,\cdots ,\left|I\right|\right\}$
	$d_i$	Part-time employment desired by candidate $i$
	$T_p^i$	Salary requested for work plan $p$ by candidate $i$, $p\in P$, where $P=P_1\cup P_2$
	${\alpha }_i$	Quality perception of candidate $i$