difficult from the northern border region and from the metropolitan center, including mexico city. hear regas, for almost a hundred years, beenheest central region, that is, jalisco, michoacan. hear reg has,and we found that indeed,rs, it was still t most important region forendiignts.choacan. narrator: jones then sees a surprising cluster here, whe heeastecit. jones:centl mexi hascarcelyn udd narrator: jones then sees a subyociascntistser here, we wererefore surines:centl mexi hascarcelyn udd hetu of migrat narrator: jones then sees a sub the norend i a huo is w s, but to verify this, i eded to go into e fiel narrator: jones's research has brought him here, the mesa e, a high dry plateau beginning near mexico city and sttching to the u.s. border. and employmentere:raditiaa gold and silr mining. but one look at the mines and a talk wh so remaining workers coirms the sad economic stistics. butchr mesutestand a drop in pe talk wh so remaining workers haveut many bs here. jos: whate found in the north central region was a decline in production and in employment in the mining sector, which corr