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+% BibTeX bibliography style `aer' (American Economic Review)
+% this file is based on the `harvard' family of files
+ % version 0.99a for BibTeX versions 0.99a or later, LaTeX version 2.09.
+ % Copyright (C) 1991, all rights reserved.
+ % Copying of this file is authorized only if either
+ % (1) you make absolutely no changes to your copy, including name, or
+ % (2) if you do make changes, you name it something other than
+ % btxbst.doc, plain.bst, unsrt.bst, alpha.bst, abbrv.bst, agsm.bst,
+ % dcu.bst, cje.bst, aer.bst, or kluwer.bst.
+ % This restriction helps ensure that all standard styles are identical.
+
+% ACKNOWLEDGEMENT:
+% This document is a modified version of alpha.bst to which it owes much of
+% its functionality.
+
+% AUTHOR
+% Peter Williams, Key Centre for Design Quality, Sydney University
+% e-mail: peterw@archsci.arch.su.oz.au
+
+ENTRY
+ { address author booktitle chapter edition editor howpublished institution
+ journal key month note number organization pages publisher school
+ series title type volume year}
+ { field.used }
+ { label.touse extra.label sort.label list.year }
+
+
+FUNCTION {not}
+{ { #0 }
+ { #1 }
+ if$
+}
+
+FUNCTION {and}
+{ {}
+ { pop$ #0 }
+ if$
+}
+
+FUNCTION {or}
+{ { pop$ #1 }
+ {}
+ if$
+}
+
+INTEGERS {quoted italic bold plain attribute
+ space comma tiedcomma semicolon colon period block empty separator
+ prev.separator next.separator next.attribute}
+
+STRINGS { s temp f name.list first.name.format later.name.formats name.style}
+
+FUNCTION {init.state.consts}
+{
+ #100 'quoted :=
+ #200 'italic :=
+ #300 'bold :=
+ #400 'plain :=
+
+ #7 'space :=
+ #6 'comma :=
+% #5 'tiedcomma :=
+% #4 'semicolon :=
+ #3 'colon :=
+ #2 'period :=
+ #1 'block :=
+ #0 'empty :=
+}
+
+FUNCTION {output2}
+{
+% Wrap the attribute.
+ attribute bold = {"{\bf " swap$ * "}" *} {} if$
+ attribute italic = {"{\it " swap$ * "}" *} {} if$
+ attribute quoted = {"``" swap$ * "''" *} {} if$
+% Append additional separators
+ separator comma = {"," * space 'separator :=} {} if$
+% separator tiedcomma = {",~" * empty 'separator :=} {} if$
+ separator space = {" " *} {} if$
+ write$
+ separator block = {newline$ "\newblock " write$} {} if$
+% Update variables, and put the new string back on the stack
+ next.attribute 'attribute :=
+ next.separator 'separator :=
+ temp
+}
+
+% <string> <separator> <string> <attribute> <final separator> output <string>
+FUNCTION {output.nonnull}
+{ 'next.separator :=
+ 'next.attribute :=
+ 'temp :=
+ 'prev.separator :=
+% If the new separator is stronger than the previous one, use it.
+ prev.separator separator < {prev.separator 'separator :=} {} if$
+% Append most separators to the string.
+ separator block = {add.period$} {} if$
+ separator period = {add.period$ space 'separator :=} {} if$
+% separator semicolon = {";" * space 'separator :=} {} if$
+ separator colon = {":" * space 'separator :=} {} if$
+ separator comma = attribute quoted = and
+ {"," * space 'separator :=} {} if$
+ output2
+}
+
+FUNCTION {output}
+{ 'next.separator :=
+ 'next.attribute :=
+ duplicate$ empty$
+ {pop$ pop$}
+ {next.attribute next.separator output.nonnull}
+ if$
+}
+
+FUNCTION {output.check}
+{ 's :=
+ 'next.separator :=
+ 'next.attribute :=
+ duplicate$ empty$
+ {pop$ pop$ "empty " s * " in " * cite$ * warning$ }
+ {next.attribute next.separator output.nonnull}
+ if$
+}
+
+FUNCTION {item.check}
+{ 'temp :=
+ empty$
+ { "empty " temp * " in " * cite$ * warning$ }
+ {}
+ if$
+}
+
+FUNCTION {plain.space} { plain space }
+
+FUNCTION {plain.space.output} { plain.space output }
+
+FUNCTION {plain.comma} { plain comma }
+
+FUNCTION {fin.entry}
+{
+ block note plain.space.output
+ period "" plain empty output.nonnull pop$
+ newline$
+}
+
+FUNCTION {field.or.null}
+{ duplicate$ empty$
+ { pop$ "" }
+ {}
+ if$
+}
+
+FUNCTION {emphasize}
+{ duplicate$ empty$
+ { pop$ "" }
+ { "{\em " swap$ * "}" * }
+ if$
+}
+
+FUNCTION {quote}
+{ duplicate$ empty$
+ { pop$ "" }
+ { add.period$ "`" swap$ * "'" * }
+ if$
+}
+
+
+% <prev name list> <new name list> compare.names <modified name list>
+INTEGERS {len1 len2 i}
+FUNCTION {compare.names}
+{ 's :=
+ 'temp :=
+ temp num.names$ 'len1 :=
+ s num.names$ 'len2 :=
+% len1 := min(len1,len2)
+ len1 len2 > {len2 'len1 :=} {} if$
+% start with an empty string, then while the components are the same
+% add "\bysame"
+ ""
+ #1 'i :=
+ {i len1 > not}
+ { temp i "{ff }{vv }{ll}{ jj}" format.name$
+% duplicate$ i int.to.str$ * warning$
+ s i "{ff }{vv }{ll}{ jj}" format.name$
+% duplicate$ i int.to.str$ * warning$
+ =
+ { #1 i < {" and " *} {} if$
+ "\bysame{}" * i #1 + 'i :=}
+ {#-1 'len1 :=}
+ if$
+ }
+ while$
+% add the rest of the second string
+ {i len2 > not}
+ { #1 i < {" and " *} {} if$
+ s i "{ff }{vv }{ll}{ jj}" format.name$ *
+ i #1 + 'i :=
+ }
+ while$
+% duplicate$ warning$
+}
+
+INTEGERS { nameptr namesleft numnames }
+
+FUNCTION {format.names}
+{ 'name.list :=
+ 'name.style :=
+ 'later.name.formats :=
+ 's := % binary separator
+ 'first.name.format :=
+ #1 'nameptr :=
+ name.list num.names$ 'numnames :=
+% If we're to make this entry bold or something, prepend to the string of names
+ name.style "" = {} {"{" name.style *} if$
+ numnames 'namesleft :=
+ { namesleft #0 > }
+ { name.list nameptr nameptr #1 = {first.name.format} {later.name.formats} if$
+ format.name$ 'temp :=
+ nameptr #1 >
+ { namesleft #1 >
+ { ", " * temp * }
+ { temp "others" =
+ { " et~al." * }
+ {nameptr #2 = % handle ", and" vs " and "
+ {s * temp *}
+ {", and " * temp * }
+ if$
+ }
+ if$
+ }
+ if$
+ }
+ 'temp
+ if$
+ nameptr #1 + 'nameptr :=
+ namesleft #1 - 'namesleft :=
+ }
+ while$
+% If we're to make this entry bold or something, append to the string of names
+ name.style "" = {} {"}" * *} if$
+}
+
+FUNCTION {format.authors}
+{ 'temp :=
+ "{vv~}{ll}{, jj}{, ff}" " and " "{ff~}{vv~}{ll}{, jj}" "" temp
+ format.names
+}
+
+FUNCTION {format.editors}
+{ 'temp :=
+ "{vv~}{ll}{, jj}{, ff}" " and " "{ff~}{vv~}{ll}{, jj}" ""
+ temp format.names
+ editor num.names$ #1 >
+ { ", eds" * }
+ { ", ed." * }
+ if$
+}
+
+FUNCTION {format.editors.notkey}
+{ editor empty$
+ { "" }
+ { "{ff~}{vv~}{ll}{, jj}" " and " "{ff~}{vv~}{ll}{, jj}" ""
+ editor format.names
+ editor num.names$ #1 > {", eds."} {", ed."} if$
+ *
+ }
+ if$
+}
+
+FUNCTION {format.title}
+{ space title quoted comma }
+
+FUNCTION {n.dashify}
+{ 'temp :=
+ ""
+ { temp empty$ not }
+ { temp #1 #1 substring$ "-" =
+ { temp #1 #2 substring$ "--" = not
+ { "--" *
+ temp #2 global.max$ substring$ 'temp :=
+ }
+ { { temp #1 #1 substring$ "-" = }
+ { "-" *
+ temp #2 global.max$ substring$ 'temp :=
+ }
+ while$
+ }
+ if$
+ }
+ { temp #1 #1 substring$ *
+ temp #2 global.max$ substring$ 'temp :=
+ }
+ if$
+ }
+ while$
+}
+
+FUNCTION {format.btitle}
+{ title emphasize
+}
+
+FUNCTION {tie.or.space.connect}
+{ duplicate$ text.length$ #3 <
+ { "~" }
+ { " " }
+ if$
+ swap$ * *
+}
+
+FUNCTION {either.or.check}
+{ empty$
+ 'pop$
+ { "can't use both " swap$ * " fields in " * cite$ * warning$ }
+ if$
+}
+
+FUNCTION {format.bvolume}
+{ volume empty$
+ { "" }
+ { "Vol." volume tie.or.space.connect
+ series empty$
+ {}
+ { " of " * series emphasize * }
+ if$
+ "volume and number" number either.or.check
+ }
+ if$
+}
+
+FUNCTION {format.bvolume.output}
+ {comma format.bvolume plain.space.output}
+
+FUNCTION {mid.sentence.q}
+{
+ separator empty = separator block = separator period = or or not
+}
+
+FUNCTION {format.number.series}
+{ volume empty$
+ { number empty$
+ {series field.or.null}
+ { mid.sentence.q
+ { "number" }
+ { "Number" }
+ if$
+ number tie.or.space.connect
+ series empty$
+ { "there's a number but no series in " cite$ * warning$ }
+ { add.period$ " In " * series quote * }
+ if$
+ }
+ if$
+ }
+ { "" }
+ if$
+}
+
+FUNCTION {format.edition.output}
+{ edition empty$
+ { }
+ { comma edition
+ mid.sentence.q { "l" } { "t" } if$
+ change.case$ " ed." *
+ plain.space.output
+ }
+ if$
+}
+
+FUNCTION {format.publisher.address}
+{
+ address empty$
+ {comma publisher plain.comma output}
+ {publisher empty$
+ {}
+ {comma address plain colon output
+ colon publisher plain.comma output}
+ if$}
+ if$
+}
+
+INTEGERS { multiresult }
+
+FUNCTION {multi.page.check}
+{ 'temp :=
+ #0 'multiresult :=
+ { multiresult not
+ temp empty$ not
+ and
+ }
+ { temp #1 #1 substring$
+ duplicate$ "-" =
+ swap$ duplicate$ "," =
+ swap$ "+" =
+ or or
+ { #1 'multiresult := }
+ { temp #2 global.max$ substring$ 'temp := }
+ if$
+ }
+ while$
+ multiresult
+}
+
+FUNCTION {format.pages}
+{ pages empty$
+ { "" }
+ { pages multi.page.check
+ { "pp.~" pages n.dashify * }
+ { "p.~" pages * }
+ if$
+ }
+ if$
+}
+
+FUNCTION {output.month.year}
+ {
+ space month plain.space.output
+ space year plain.comma "year" output.check
+ }
+
+FUNCTION {output.vol.num.pages}
+{ space volume italic space output
+ number empty$
+ {}
+ { space "(" number * ")" * plain.comma output.nonnull
+ volume empty$
+ { "there's a number but no volume in " cite$ * warning$ }
+ {}
+ if$
+ }
+ if$
+% "*** a" warning$
+ comma 'next.separator := % hack
+ pages empty$
+ {}
+ { number empty$ volume empty$ and
+ { comma format.pages plain.space.output }
+ { comma pages n.dashify plain.space.output }
+ if$
+ }
+ if$
+}
+
+FUNCTION {format.chapter.pages}
+{ chapter empty$
+ 'format.pages
+ { type empty$
+ { "chapter" }
+ { type "l" change.case$ }
+ if$
+ chapter tie.or.space.connect
+ pages empty$
+ {}
+ { ", " * format.pages * }
+ if$
+ }
+ if$
+}
+
+FUNCTION {output.in.ed.booktitle}
+{ booktitle "booktitle" item.check
+ comma "in" plain.space output.nonnull
+ editor empty$
+ { space booktitle quoted space output.nonnull}
+ { space format.editors.notkey plain.space output.nonnull
+ comma booktitle italic comma output.nonnull
+ }
+ if$
+}
+
+FUNCTION {empty.misc.check}
+{ author empty$ title empty$ howpublished empty$
+ month empty$ year empty$ note empty$
+ and and and and and
+ key empty$ not and
+ { "all relevant fields are empty in " cite$ * warning$ }
+ {}
+ if$
+}
+
+FUNCTION {format.thesis.type}
+{ type empty$
+ {}
+ { pop$
+ type "t" change.case$
+ }
+ if$
+}
+
+FUNCTION {format.tr.number}
+{ type empty$
+ { "Technical Report" }
+ 'type
+ if$
+ number empty$
+ { }
+ { number tie.or.space.connect }
+ if$
+}
+
+FUNCTION {format.article.crossref}
+{ key empty$
+ { journal empty$
+ { "need key or journal for " cite$ * " to crossref " * crossref *
+ warning$
+ ""
+ }
+ { "in {\it " journal * "\/} \cite{" * crossref * "}" *}
+ if$
+ }
+ { add.period$ "In \citeasnoun{" crossref * "}" * }
+ if$
+
+}
+
+FUNCTION {format.book.crossref}
+{ volume empty$
+ { "empty volume in " cite$ * "'s crossref of " * crossref * warning$
+ "in "
+ }
+ { "Vol." volume tie.or.space.connect
+ " of " *
+ }
+ if$
+ editor empty$
+ editor field.or.null author field.or.null =
+ or
+ { key empty$
+ { series empty$
+ { "need editor, key, or series for " cite$ * " to crossref " *
+ crossref * warning$
+ "" *
+ }
+ { "{\it " * series * "\/} \cite{" * crossref * "}" *}
+ if$
+ }
+ { " \citeasnoun{" * crossref * "}" * }
+ if$
+ }
+ { " \citeasnoun{" * crossref * "}" * }
+ if$
+}
+
+FUNCTION {output.incoll.inproc.crossref}
+{ editor empty$
+ editor field.or.null author field.or.null =
+ or
+ { key empty$
+ { booktitle empty$
+ { "need editor, key, or booktitle for " cite$ * " to crossref " *
+ crossref * warning$
+ }
+ { period "In {\it " booktitle * "\/}" * " \cite{" * crossref * "}" * plain.space output.nonnull}
+ if$
+ }
+ { period "In \citeasnoun{" crossref * "}" * plain.space output.nonnull}
+ if$
+ }
+ { period "In \citeasnoun{" crossref * "}" * plain.space output.nonnull}
+ if$
+}
+
+INTEGERS { len }
+
+FUNCTION {chop.word}
+{ 's :=
+ 'len :=
+ s #1 len substring$ =
+ { s len #1 + global.max$ substring$ }
+ 's
+ if$
+}
+
+INTEGERS { author.field editor.field organization.field title.field key.field }
+
+FUNCTION {init.field.constants}
+{ #0 'author.field :=
+ #1 'editor.field :=
+ #2 'organization.field :=
+ #3 'title.field :=
+ #4 'key.field :=
+}
+
+FUNCTION {format.lab.names.abbr}
+{ 'name.list :=
+ name.list num.names$ 'numnames :=
+ numnames #1 >
+ { numnames #2 >
+ { name.list #1 "{vv~}{ll}" format.name$ " et al." * }
+ { name.list #2 "{ff }{vv }{ll}{ jj}" format.name$ "others" =
+ { name.list #1 "{vv~}{ll}" format.name$ " et al." * }
+ { name.list #1 "{vv~}{ll}" format.name$ " and " *
+ name.list #2 "{vv~}{ll}" format.name$ *
+ }
+ if$
+ }
+ if$
+ field.used editor.field = {", eds" *} {} if$
+ }
+ {
+ name.list #1 "{vv~}{ll}" format.name$
+ field.used editor.field = {", ed" *} {} if$
+ }
+ if$
+}
+
+FUNCTION {format.lab.names.full}
+{ 'name.list :=
+ #1 'nameptr :=
+ name.list num.names$ 'numnames :=
+ numnames 'namesleft :=
+ { namesleft #0 > }
+ { name.list nameptr "{vv~}{ll}" format.name$ 'temp :=
+ nameptr #1 >
+ { namesleft #1 >
+ { ", " * temp * }
+ { temp "others" =
+ { " et~al." * }
+ { " and " * temp * }
+ if$
+ }
+ if$
+ }
+ 'temp
+ if$
+ nameptr #1 + 'nameptr :=
+ namesleft #1 - 'namesleft :=
+ }
+ while$
+ numnames #1 > field.used editor.field = and {", eds" *} {} if$
+ numnames #1 = field.used editor.field = and {", ed" *} {} if$
+}
+
+STRINGS { prev.author }
+
+FUNCTION {make.list.label}
+{author.field field.used =
+ { prev.author author compare.names format.authors
+ author 'prev.author :=}
+ { editor.field field.used =
+ { prev.author editor compare.names format.editors
+ editor 'prev.author := }
+ { organization.field field.used =
+ { "The " #4 organization chop.word
+ duplicate$ prev.author = {pop$ "\bysame{}"}
+ {duplicate$ 'prev.author :=} if$}
+ { "foo" 'prev.author :=
+ title.field field.used =
+ { format.btitle }
+ { key.field field.used =
+ { key #3 text.prefix$ }
+ { "Internal error :001 on " cite$ * " label" * warning$ }
+ if$
+ }
+ if$
+ }
+ if$
+ }
+ if$
+ }
+ if$
+}
+
+FUNCTION {make.full.label}
+{ author.field field.used =
+ { author format.lab.names.full }
+ { editor.field field.used =
+ { editor format.lab.names.full }
+ { organization.field field.used =
+ { "The " #4 organization chop.word #3 text.prefix$ }
+ { title.field field.used =
+ { format.btitle }
+ { key.field field.used =
+ { key #3 text.prefix$ }
+ { "Internal error :001 on " cite$ * " label" * warning$ }
+ if$
+ }
+ if$
+ }
+ if$
+ }
+ if$
+ }
+ if$
+}
+
+FUNCTION {make.abbr.label}
+{ author.field field.used =
+ { author format.lab.names.abbr }
+ { editor.field field.used =
+ { editor format.lab.names.abbr }
+ { organization.field field.used =
+ { "The " #4 organization chop.word #3 text.prefix$ }
+ { title.field field.used =
+ { format.btitle }
+ { key.field field.used =
+ { key #3 text.prefix$ }
+ { "Internal error :001 on " cite$ * " label" * warning$ }
+ if$
+ }
+ if$
+ }
+ if$
+ }
+ if$
+ }
+ if$
+}
+
+FUNCTION {output.bibitem}
+{ newline$
+ "\harvarditem[" write$
+ make.abbr.label write$
+ "]{" write$
+ make.full.label write$
+ "}{" write$
+ list.year write$
+ "}{" write$
+ cite$ write$
+ "}" write$
+ newline$
+ ""
+ empty 'separator :=
+ plain 'attribute :=
+% }
+%
+% FUNCTION {list.label.output}
+% {
+ space make.list.label bold comma output.nonnull
+ }
+
+FUNCTION {author.item.check} {author "author" item.check}
+
+FUNCTION {format.title.if.not.sortkey.check}
+{title.field field.used =
+ {}
+ { format.title "title" output.check }
+ if$}
+
+FUNCTION {article}
+{ output.bibitem
+ author.item.check
+ format.title.if.not.sortkey.check
+ crossref missing$
+ { space journal italic comma "journal" output.check
+ output.month.year
+ output.vol.num.pages
+ }
+ { space format.article.crossref plain.space output.nonnull
+ comma format.pages plain.space.output
+ }
+ if$
+ fin.entry
+}
+
+FUNCTION {book}
+{ output.bibitem
+ author empty$
+ { editor "author and editor" item.check }
+ { crossref missing$
+ { "author and editor" editor either.or.check }
+ {}
+ if$
+ }
+ if$
+ title.field field.used =
+ {}
+ { space title italic space "title" output.check }
+ if$
+ crossref missing$
+ {
+ space format.number.series plain.space.output
+ format.edition.output
+ format.bvolume.output
+ format.publisher.address
+ output.month.year
+ }
+ { space format.book.crossref plain.space output.nonnull
+ format.edition.output
+ }
+ if$
+ fin.entry
+}
+
+FUNCTION {booklet}
+{ output.bibitem
+ format.title.if.not.sortkey.check
+ space howpublished plain.space.output
+ space address plain.space.output
+ output.month.year
+ fin.entry
+}
+
+FUNCTION {inbook}
+{ output.bibitem
+ author empty$
+ { editor "author and editor" item.check }
+ { crossref missing$
+ { "author and editor" editor either.or.check }
+ {}
+ if$
+ }
+ if$
+ title.field field.used =
+ {}
+ { space title italic space "title" output.check }
+ if$
+ crossref missing$
+ { space format.number.series plain.space.output
+ format.edition.output
+ comma format.bvolume plain.comma output
+ format.publisher.address
+ output.month.year
+ }
+ { space format.book.crossref plain.space output.nonnull
+ format.edition.output
+ }
+ if$
+ format.chapter.pages "chapter and pages" output.check
+ fin.entry
+}
+
+FUNCTION {incollection}
+{ output.bibitem
+ format.title.if.not.sortkey.check
+ author.item.check
+ crossref missing$
+ { output.in.ed.booktitle
+ format.edition.output
+ format.bvolume.output
+ space format.number.series plain.space.output
+ format.publisher.address
+ output.month.year
+ }
+ { output.incoll.inproc.crossref }
+ if$
+ space format.chapter.pages plain.space.output
+ fin.entry
+}
+
+FUNCTION {inproceedings}
+{ output.bibitem
+ format.title.if.not.sortkey.check
+ author.item.check
+ crossref missing$
+ { output.in.ed.booktitle
+ format.bvolume.output
+ space format.number.series plain.space.output
+ address empty$
+ { space organization plain.space.output
+ space publisher plain.space.output
+ }
+ { space organization plain.space.output
+ space publisher plain.space.output
+ space address plain.space output.nonnull
+ }
+ if$
+ output.month.year
+ }
+ { output.incoll.inproc.crossref}
+ if$
+ space format.pages plain.space.output
+ fin.entry
+}
+
+FUNCTION {conference} { inproceedings }
+
+FUNCTION {manual}
+{ output.bibitem
+ title.field field.used =
+ {}
+ {author empty$ {comma}{space} if$ title italic space "title" output.check }
+ if$
+ organization.field field.used = organization empty$ or
+ {} {space organization plain.space output.nonnull} if$
+ format.edition.output
+ format.publisher.address
+ output.month.year
+ fin.entry
+}
+
+FUNCTION {mastersthesis}
+{ output.bibitem
+ author.item.check
+ format.title.if.not.sortkey.check
+ space "Master's thesis" format.thesis.type plain.space output.nonnull
+ comma school plain.space "school" output.check
+ comma address plain.space.output
+ output.month.year
+ fin.entry
+}
+
+FUNCTION {misc}
+{ output.bibitem
+ format.title.if.not.sortkey.check
+ space howpublished plain.space.output
+ output.month.year
+ fin.entry
+ empty.misc.check
+}
+
+FUNCTION {phdthesis}
+{ output.bibitem
+ author.item.check
+ title.field field.used =
+ {}
+ { space title quoted period "title" output.check }
+ if$
+ space "PhD dissertation" format.thesis.type plain.space output.nonnull
+ comma school plain.space "school" output.check
+ comma address plain.space.output
+ output.month.year
+ fin.entry
+}
+
+FUNCTION {proceedings}
+{ output.bibitem
+ title.field field.used =
+ {}
+ { space title italic space "title" output.check }
+ if$
+ format.bvolume.output
+ space format.number.series plain.space.output
+ address empty$
+ { editor empty$
+ {}
+ { space organization plain.space.output
+ }
+ if$
+ space publisher plain.space.output
+ }
+ { editor empty$
+ {}
+ { space organization plain.space.output }
+ if$
+ space publisher plain.space.output
+ space address plain.space output.nonnull
+ }
+ if$
+ output.month.year
+ fin.entry
+}
+
+FUNCTION {techreport}
+{ output.bibitem
+ author.item.check
+ format.title.if.not.sortkey.check
+ space format.tr.number plain.space output.nonnull
+ institution empty$
+ {}
+ { comma institution plain.space "institution" output.check }
+ if$
+ comma address plain.space.output
+ output.month.year
+ fin.entry
+}
+
+FUNCTION {unpublished}
+{ output.bibitem
+ author.item.check
+ format.title.if.not.sortkey.check
+ output.month.year
+ note "note" item.check
+ fin.entry
+}
+
+FUNCTION {default.type} { misc }
+
+MACRO {jan} {"January"}
+
+MACRO {feb} {"February"}
+
+MACRO {mar} {"March"}
+
+MACRO {apr} {"April"}
+
+MACRO {may} {"May"}
+
+MACRO {jun} {"June"}
+
+MACRO {jul} {"July"}
+
+MACRO {aug} {"August"}
+
+MACRO {sep} {"September"}
+
+MACRO {oct} {"October"}
+
+MACRO {nov} {"November"}
+
+MACRO {dec} {"December"}
+
+READ
+
+EXECUTE {init.field.constants}
+
+FUNCTION {sortify}
+{ purify$
+ "l" change.case$
+}
+
+FUNCTION {author.editor.key.label}
+{ author empty$
+ { editor empty$
+ { title empty$
+ { key.field 'field.used := }
+ { title.field 'field.used := }
+ if$
+ }
+ { editor.field 'field.used := }
+ if$
+ }
+ { author.field 'field.used := }
+ if$
+}
+
+FUNCTION {key.organization.label}
+ {organization empty$
+ { title empty$
+ { key.field 'field.used := }
+ { title.field 'field.used := }
+ if$
+ }
+ { organization.field 'field.used := }
+ if$}
+
+FUNCTION {author.key.organization.label}
+{ author empty$
+ { key.organization.label}
+ { author.field 'field.used := }
+ if$
+}
+
+FUNCTION {editor.key.organization.label}
+{ editor empty$
+ { key.organization.label}
+ { editor.field 'field.used := }
+ if$
+}
+
+FUNCTION {sort.format.title}
+{ 'temp :=
+ "A " #2
+ "An " #3
+ "The " #4 temp chop.word
+ chop.word
+ chop.word
+ sortify
+ #1 global.max$ substring$
+}
+
+FUNCTION {calc.label}
+{ type$ "book" =
+ type$ "inbook" =
+ or
+ 'author.editor.key.label
+ { type$ "proceedings" =
+ 'editor.key.organization.label
+ { type$ "manual" =
+ 'author.key.organization.label
+ 'author.editor.key.label % don't really use .editor.
+ if$
+ }
+ if$
+ }
+ if$
+ make.abbr.label
+ title.field field.used =
+ { sort.format.title }
+ { sortify }
+ if$
+ year field.or.null purify$ #-1 #4 substring$ sortify
+ *
+ 'sort.label :=
+}
+
+FUNCTION {first.presort}
+{ "abcxyz" 'prev.author :=
+ calc.label
+ sort.label
+ title.field field.used =
+ {}
+ { " "
+ *
+ make.list.label sortify
+ *
+ " "
+ *
+ title field.or.null
+ sort.format.title
+ *
+ }
+ if$
+ #1 entry.max$ substring$
+ 'sort.key$ :=
+}
+
+
+ITERATE {first.presort}
+
+SORT
+
+STRINGS { last.sort.label next.extra }
+
+INTEGERS { last.extra.num }
+
+FUNCTION {initialize.last.extra.num}
+{ #0 int.to.chr$ 'last.sort.label :=
+ "" 'next.extra :=
+ #0 'last.extra.num :=
+}
+
+FUNCTION {forward.pass}
+{ last.sort.label sort.label =
+ { last.extra.num #1 + 'last.extra.num :=
+ last.extra.num int.to.chr$ 'extra.label :=
+ }
+ { "a" chr.to.int$ 'last.extra.num :=
+ "" 'extra.label :=
+ sort.label 'last.sort.label :=
+ }
+ if$
+}
+
+FUNCTION {reverse.pass}
+{ next.extra "b" =
+ { "a" 'extra.label := }
+ {}
+ if$
+ year empty$
+ { "n.d." extra.label * 'list.year := }
+ { year extra.label * 'list.year := }
+ if$
+ extra.label 'next.extra :=
+}
+
+EXECUTE {initialize.last.extra.num}
+
+ITERATE {forward.pass}
+
+REVERSE {reverse.pass}
+
+FUNCTION {second.presort}
+{ "abcxyz" 'prev.author :=
+ make.list.label
+ title.field field.used =
+ { sort.format.title }
+ { sortify }
+ if$
+ " "
+ *
+ list.year field.or.null sortify
+ *
+ " "
+ *
+ title.field field.used =
+ {}
+ { title field.or.null
+ sort.format.title
+ *
+ }
+ if$
+ #1 entry.max$ substring$
+ 'sort.key$ :=
+}
+
+ITERATE {second.presort}
+
+SORT
+
+
+INTEGERS { number.label }
+
+FUNCTION {initialize.longest.label}
+{
+ #1 'number.label :=
+ "abcxyz" 'prev.author :=
+}
+
+FUNCTION {longest.label.pass}
+{
+ "" 'extra.label :=
+ author empty$ { editor empty$ {"foo"} {editor} if$}
+ {author}
+ if$
+ 'f :=
+% remember this entry to compare to the next one
+ author empty$ { editor empty$ {"abcxyz"} {editor} if$} {author} if$
+ 'prev.author :=
+}
+
+EXECUTE {initialize.longest.label}
+
+ITERATE {longest.label.pass}
+
+FUNCTION {begin.bib}
+{ preamble$ empty$
+ {}
+ { preamble$ write$ newline$ }
+ if$
+ "\ifx\undefined\bysame" write$ newline$
+ "\newcommand{\bysame}{\leavevmode\hbox to\leftmargin{\hrulefill\,\,}}"
+ write$ newline$
+ "\fi" write$ newline$
+ "\begin{thebibliography}{xx}" write$ newline$
+}
+
+EXECUTE {begin.bib}
+
+EXECUTE {init.state.consts}
+
+FUNCTION {init.call}
+ { "abcxyz" 'prev.author := }
+
+EXECUTE {init.call}
+
+ITERATE {call.type$}
+
+FUNCTION {end.bib}
+ {newline$ "\end{thebibliography}" write$ newline$ }
+
+EXECUTE {end.bib}
+