That analysis is guided by an economist's faith in the maxim that people are generally pretty good at looking out for their own interests.
( ( That analysis ) ( ( is ( ( guided ( by ( ( ( an ( economist 's ) ) faith ) ( in ( the maxim ) ) ) ) ) ( that ( people ( ( are generally ) ( pretty ( good ( at ( ( looking out ) ( for ( their ( own interests ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT That) (NN analysis)) (VP (VBZ is) (VP (VBN guided) (PP (IN by) (NP (NP (NP (DT an) (NN economist) (POS 's)) (NN faith)) (PP (IN in) (NP (DT the) (NN maxim))))) (SBAR (IN that) (S (NP (NNS people)) (VP (VBP are) (ADVP (RB generally)) (ADJP (RB pretty) (JJ good) (PP (IN at) (S (VP (VBG looking) (PRT (RP out)) (PP (IN for) (NP (PRP$ their) (JJ own) (NNS interests)))))))))))) (. .)))
People focus on the good of others 
( People ( focus ( on ( ( the good ) ( of others ) ) ) ) )
(ROOT (S (NP (NNS People)) (VP (VBP focus) (PP (IN on) (NP (NP (DT the) (NN good)) (PP (IN of) (NP (NNS others))))))))