I use the term election here to mean a decision of God held/instigated primarily in the council of God as seemingly un-swervable by the works or actions of humans. - I am surer about some of these than others. The big question however, is who is elected, individuals or collective groups, and what are they elected to, privilege or salvation. (More later).
'before the twins were born or had done anything good or bad'
'in order that God's purpose in election might stand'
'not by works but by him who calls'
'I will have mercy on whom I have mercy'
'I raised you up'
'It does not therefore depend on mans desire or effort, but on God's mercy'
'he hardens whom he wants to harden'
'For who can resist his will'
'prepared for destruction'
'prepared in advance for glory'
'whom he called'
'I will call them/her'
'I lay in Zion, a stone that causes men to stumble'
Note that there does not seem to be an explicit designation of human choice language (as defined by libertarian free-will theology) to be found to compete with election language in this chapter. There are some things like:
'Gentiles did not pursue'
'They pursed it not by faith but as if it were by works'
'the one who trusts in him'
Which seems to designate a level of responsibility to human choice-making faculties, however, for this to be libertarian free will, you have to isolate them from all the above election language in this chapter. One must take them in context with the sovereignty of God as expressed here and see that God is sovereign, yet paradoxically, man responsible. Both meet in God's covenant of grace, won through the life, death, resurrection, and assertion of his Son Jesus Christ. (for more information on this, see Jonathan Edwards on the the covenant of grace at http://www.the-highway.com/articleMay01.html)