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)))))))))))) (. .)))
The analysis is guided by the belief that people are generally good at looking into their own interests 
( ( The analysis ) ( is ( ( guided ( by ( the belief ) ) ) ( that ( people ( are ( generally ( good ( at ( looking ( into ( their ( own interests ) ) ) ) ) ) ) ) ) ) ) ) )
(ROOT (S (NP (DT The) (NN analysis)) (VP (VBZ is) (VP (VBN guided) (PP (IN by) (NP (DT the) (NN belief))) (SBAR (IN that) (S (NP (NNS people)) (VP (VBP are) (ADJP (RB generally) (JJ good) (PP (IN at) (S (VP (VBG looking) (PP (IN into) (NP (PRP$ their) (JJ own) (NNS interests))))))))))))))