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\fancyhead[C]{Estimating time preferences from convex budgets}

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\section*{Andreoni, J. et Sprenger, C. (2012). Estimating time preferences from convex budgets. American Economic Review}\\

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\noindent Welcome and thank you for participating.\\

\textit{Eligibility for this study:} To be in this study, you need to meet these criteria. You must have a campus mailing of the form:\\

YOUR NAME\\

9450 GILMAN DR 92(MAILBOX NUMBER)\\

LA JOLLA CA 92092-(MAILBOX NUMBER)\\

You must live in:
\begin{itemize} 
          \item XXX College
          \item XXX College AND have a student mail box number between 92XXXX and 92XXXX
          \item XXX College AND have a student mail box number between 92XXXX through 92XXXX
       \end{itemize} 

Your mailbox must be a valid way for you to receive mail from now through the end of the Spring Quarter. You must be willing to provide your name, campus mailbox, email address, and student PID. This information will only be seen by Professor Andreoni and his assistants. After payment has been sent, this information will be destroyed. Your identity will not be a part of any subsequent data analysis.\\
\indent You must be willing to receive your payment for this study by check, written to you by Professor James Andreoni, Director of the UCSD Economics Laboratory. The checks will be drawn on the USE Credit Union on campus. This means that, if you wish, you can cash your checks for free at the USE Credit Union any weekday from 9:00 am to 5:00 pm with valid identification (divers license, passport, etc.). The checks will be delivered to you at your campus mailbox at a date to be determined by your decisions in this study, and by chance. The latest you could receive payment is the last week of classes in the Spring Quarter.\\
\indent If you do not meet all of these criteria, please inform us of this now.\\

\textit{Earning Money}\\

To begin, you will be given a \$10 thank-you payment, just for participating in this study! You will receive this thank-you payment in two equally sized payments of \$5 each. The two \$5 payments will come to you at two different times. These times will be determined in the way described below.\\
\indent In this study, you will make 47 choices over how to allocate money between two points in time, one time is ”earlier” and one is ”later.” Both the earlier and later times will vary across decisions. This means you could be receiving payments as early as today, and as late as the last week of classes in the Spring Quarter, or possibly two other dates in between. Once all 47 decisions have been made, we will randomly select one of the 47 decisions as the decision-that- counts. We will use the decision-that-counts to determine your actual earnings. Note, since all decisions are equally likely to be chosen, you should make each decision as if it will be the decision-that-counts. When calculating your earnings from the decision-that-counts, we will add to your earnings the two \$5 thank you payments. Thus, you will always get paid at least \$5 at the chosen earlier time, and at least \$5 at the chosen later time.\\
\indent \textit{IMPORTANT}: All payments you receive will arrive to your campus mailbox. That includes payments that you receive today as well as payments you may receive at later dates. On the scheduled day of payment, a check will be placed for delivery in campus mail services by Professor Andreoni and his assistants. \textit{By special arrangement, campus mail services has guaranteed delivery of 100\% of your payments on the same day}.\\
\indent As a reminder to you, the day before you are scheduled to receive one of your payments, we will send you an e-mail notifying you that the payment is coming.\\
\indent On your table is a business card for Professor Andreoni with his contact information. Please keep this in a safe place. If one of your payments is not received you should immediately contact Professor Andreoni, and we will hand-deliver payment to you.\\\\

\indent \textit{Your Identity}\\

\indent In order to receive payment, we will need to collect the following pieces of information from you: name, campus mail box, email address, and student PID. This information will only be seen by Professor Andreoni and his assistants. After all payments have been sent, this information will be destroyed. Your identity will not be a part of subsequent data analysis.\\
\indent You have been assigned a participant number. This will be linked to your personal information in order to complete payment. After all payments have been made, only the participant number will remain in the data set.\\
\indent On your desk are two envelopes: one for the sooner payment and one for the later payment. Please take the time now to address them to yourself at your campus mail box.



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\section*{The Study}
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\noindent In this study you are asked to make a series of 47 decisions about how to divide a set a tokens between two dates. Tokens will later be exchanged for money. Tokens you allocate to later date will always be worth more money than tokens you allocate to the earlier date. This process is best described by an example.\\
Below is a sample Decision Screen, like what you will see in the study.\\

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\section*{Choosing the Decision-that-Counts}
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The first decision on the screen shows the choice to allocate 100 tokens between February 12th and February 26th. Notice that today's date is high-lighted in yellow on the calendar above the tab. Also note that the earlier date (February 12th is highlighted in green while the later date (February 26th) is highlighted in blue. In each decision the dates are highlighted so that you can easily see when the decision begins and ends.\\

\noindent In this decision, each token you allocate to February 12th is worth \$0.10, while each token you allocate to February 26th is worth \$0.15. So, if you allocate all 100 tokens to February 12th you will earn \$10 on this date, and nothing on February 26th. If you allocate all 100 tokens to February 26th you will receive \$15 on this date and nothing on February 12th. You are also free to allocate some tokens to the earlier date and some to the later date. For instance, if you allocate 50 tokens to February 12th and 50 tokens to February 26th, you will earn \$5.00 on February 12th and \$7.50 on February 26th. Remember that however you allocate the tokens, any earnings will be added to your \$5 thank-you payment for both the earlier and later dates. So, even if you allocate all your tokens to one of the dates, you will still receive a check of at least \$5 on both the earlier and later dates.\\

\noindent Notice that you can navigate through all 47 decisions by using the tabs at the top of the decision screen. Notice also that, on the right, the computer automatically calculates how much you will receive on both the earlier and later dates, if this is chosen as the decision that-counts. You can revise your choices as much as you like. Once you are satisfied with all of your decisions, you can click on the "submit decisions" button.




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