michael spence said that what has happened is astonishing in the united states. we have seen in the past decade the movement of all of these tradable goods jobs, which were manufacturing jobs, and the increase in services jobs. the increase in services, he says, you have a problem. they're not going to pay as much. it contributes to growing inequality of wages when you don't have good paying, middle-class jobs that are tied to things like manufacturing. when you look at occupy wall street, the frustration that people are expressing is that we do not have jobs. we have huge inequality. oaks on wall street are being paid hundreds of millions of dollars in some cases, and we can't even get a service job that is going to put food on the table. i think that is the beginning of the wake-up call. >> we been to detroit where we both lived for a long time. i worked at the whale plant at belle isle. my father was an engineer there. we went back. we asked for something as simple as a map of detroit. let me show you something. this is shocking. what you have, a little area o

michael spence is directing the excavation. he has just found some pottery in one of the ruins. spence: it's painted here. you can see that there's red paint over most of the interior except up along the rim. there's a little bit up there, too. it's going to be very delicate, very fragile. and i'll try and reassemble it and see if there's any sort of a design on it, or if it's just a solid red. we've been picking up pottery from all over the fields. and in examining the pottery, we saw that a high proportion of it was foreign to the city. and we knew from the work of others that it came from the oaxacan area. it turns out that actually it was produced here. the people moved here, but they continued to make pottery in their home tradition. keach: the pottery indicates that this compound may have been occupied by traders from far-off monte alban, an indication of a complex economy here. bill sanders. one of the aspects of culture that is extraordinarily variable is the economy. economy means the ownership of property and the production and distribution of goods. there are cultures

michael spence said that what has happened is astonishing in the united states. we have seen in the past decade the movement of all of these tradable goods jobs, which were manufacturing jobs, and the increase in services jobs. the increase in services, he says, you have a problem. they're not going to pay as much. it contributes to growing inequality of wages when you don't have good paying, middle-class jobs that are tied to things like manufacturing. when you look at occupy wall street, the frustration that people are expressing is that we do not have jobs. we have huge inequality. oaks on wall street are being paid hundreds of millions of dollars in some cases, and we can't even get a service job that is going to put food on the table. i think that is the beginning of the wake-up call. >> we been to detroit where we both lived for a long time. i worked at the whale plant at belle isle. my father was an engineer there. we went back. we asked for something as simple as a map of detroit. let me show you something. this is shocking. what you have, a little area o