santiago center-left senator alejandro guillier conservative billionaire sebastian pinera go head head runoff chile presidency sunday secure top two spot nov. 19 first-round vote major poll past month leave indications succeed outgo center-left president michelle bachelet world top copper producer main proposals candidates former journalist elect senate 2013 promise deepen progressive tax education labor reform ideological ally bachelet spend plan include investments house infrastructure carry price tag 10 billion guillier pledge diversify chile economy away copper add value export process metal home would seek plebiscite 2018 rewrite dictatorship-era constitution include protections workers indigenous communities since first round guillier pinera endorse public option compete chile private pension fund widely praise worldwide criticize deliver too-small payouts guillier also recommend new mandatory contribution employers guillier pinera call repeal state-run copper producer codelco mandatory contribution 10 percent profit military guillier signal would seek maintain government strong tie codelco workers something spar company strike hit private miners bachelet billionaire businessman serve president 2010 2014 promise make chile first country latin america achieve develop nation status organization economic cooperation development paris-based club wealthy nations pinera investor favorite would cut corporate tax increase investment say policies would double chile economic growth eliminate poverty 2025 pinera 14 billion four-year spend plan include overhaul bachelet tax reform 2.7 billion new investments infrastructure hospitals pinera say would pay proposals cut unnecessary government spend simplify tax code pinera want revitalize increase competition chile private pension system plan include new subsidies raise pension women middle class well incentives encourage workers retire late want codelco deploy realistic investment plan use exist resources focus exist assets rather new project factbox candidate platforms chile presidential runoff