Retailers have an incentive to stock high levels of  They want both to provide sufficient display stock to attract customers'empty shelves are not inviting'and to have products available for those who wish to purchase them.
( Retailers ( ( have ( an ( incentive ( to ( stock ( ( ( high levels ) ( of They ) ) ( want ( both ( to ( ( provide ( sufficient ( display stock ) ) ) ( to ( attract ( customers ( 'em ( pty ( shelves ( ( are not ) ( ( inviting ` ) ( and ( to ( have ( products ( available ( for ( those ( who ( wish ( to ( purchase them ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Retailers)) (VP (VBP have) (NP (DT an) (NN incentive) (S (VP (TO to) (VP (VB stock) (SBAR (S (NP (NP (JJ high) (NNS levels)) (PP (IN of) (NP (PRP They)))) (VP (VBP want) (S (VP (DT both) (TO to) (VP (VB provide) (NP (JJ sufficient) (NN display) (NN stock)) (S (VP (TO to) (VP (VB attract) (NP (NP (NNS customers)) (SBAR (S (NP (PRP 'em)) (VP (VBP pty) (SBAR (S (NP (NNS shelves)) (VP (VBP are) (RB not) (VP (VBG inviting) (`` `) (S (NP (NNP and)) (VP (TO to) (VP (VB have) (S (NP (NNS products)) (ADJP (JJ available) (PP (IN for) (NP (NP (DT those)) (SBAR (WHNP (WP who)) (S (VP (VBP wish) (S (VP (TO to) (VP (VB purchase) (NP (PRP them))))))))))))))))))))))))))))))))))))) (. .)))
Retailers want to provide enough display stock to attract customers to their stores.
( Retailers ( ( want ( to ( ( provide ( enough ( display stock ) ) ) ( to ( ( attract customers ) ( to ( their stores ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Retailers)) (VP (VBP want) (S (VP (TO to) (VP (VB provide) (NP (JJ enough) (NN display) (NN stock)) (S (VP (TO to) (VP (VB attract) (NP (NNS customers)) (PP (TO to) (NP (PRP$ their) (NNS stores)))))))))) (. .)))