In each round you'll be randomly paired with a Seller, but before that you'll have to decide how much money to bring to the meeting by taking a loan that you'll have to repay at the end of the round.
The interest rate for borrowing money will be {{r_percentage_1|to0}}% for the first {{half_num_round|to0}} rounds and {{r_percentage_2|to0}}% for the last {{half_num_round|to0}} rounds (and {{r_percentage_practice|to0}}% for both practice rounds)
Once you meet with the Seller, you can make as many offers as you'd like regarding how much Output you want to purchase, and the Payment you are willing to make for them.
You will also receive offers from the Seller regarding how much Output they'd like to produce and sell, and the Payment they'd wish to receive for them.
Your payoff for buying said Output, q, for you as a Buyer (expressed in $) is: U(q)={{A|to2}}q{{a}}
The bargaining concludes if you accept an offer from the Seller, they accept one of your offers, or you run out of time.
If an agreement is reached you'll receive your payoff from buying that Output and make the agreed Payment, if NO agreement is reached there will be no production or Payment.
At the end of the round, regardless of whether an agreement is reached, you will receive a fix amount of {{endowment_1|cu|to1}} for the first {{half_num_round|to0}} rounds and {{endowment_2|cu|to1}} thereafter, that will always be enough to help repay the amount you borrowed plus any interest.
Thus, your payoff for the round will be calculated as follows:
Payoff for purchased Output minus the agreed Payment plus your fix amount minus repayment of your loan: