After teaching mathematics and physics in Ghana with the Peace Corps (1963-1965), Gibbard studied philosophy at Harvard University, participating in the seminar on social and political philosophy with John Rawls, Kenneth J. Arrow, Amartya K. Sen, and Robert Nozick. In 1971 Gibbard earned his Ph.D., writing a dissertation under the direction of John Rawls. Soon after his doctoral degree, Gibbard provided a first proof of a conjecture that strategic voting was an intrinsic feature of non-dictatorial voting systems with at least three choices, a conjecture of Michael Dummett and Robin Farquharson.
After teaching mathematics and physics in Ghana with the Peace Corps (1963-1965), Gibbard studied philosophy at Harvard University, participating in the seminar on social and political philosophy with John Rawls, Kenneth J. Arrow, Amartya K. Sen, and Robert Nozick.
mark
after
After
SCONJ
IN
advcl
VerbForm=Ger
teach
teaching
VERB
VBG
obj
Number=Sing
mathematics
mathematics
NOUN
NN
cc
and
and
CCONJ
CC
conj
Number=Sing
physics
physics
NOUN
NN
case
in
in
ADP
IN
obl
Number=Sing
Ghana
Ghana
PROPN
NNP
case
with
with
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
compound
Number=Sing
Peace
Peace
PROPN
NNP
obl
Number=Sing
Corps
Corps
PROPN
NNP
punct
(
(
PUNCT
-LRB-
nmod:tmod
NumForm=Digit|NumType=Card
1963
1963
NUM
CD
case
-
-
SYM
SYM
nmod
NumForm=Digit|NumType=Card
1965
1965
NUM
CD
punct
)
)
PUNCT
-RRB-
punct
,
,
PUNCT
,
nsubj
Number=Sing
Gibbard
Gibbard
PROPN
NNP
root
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
study
studied
VERB
VBD
obj
Number=Sing
philosophy
philosophy
NOUN
NN
case
at
at
ADP
IN
compound
Number=Sing
Harvard
Harvard
PROPN
NNP
obl
Number=Sing
University
University
PROPN
NNP
punct
,
,
PUNCT
,
advcl
VerbForm=Ger
participate
participating
VERB
VBG
case
in
in
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
obl
Number=Sing
seminar
seminar
NOUN
NN
case
on
on
ADP
IN
amod
Degree=Pos
social
social
ADJ
JJ
cc
and
and
CCONJ
CC
conj
Degree=Pos
political
political
ADJ
JJ
nmod
Number=Sing
philosophy
philosophy
NOUN
NN
case
with
with
ADP
IN
nmod
Number=Sing
John
John
PROPN
NNP
flat
Number=Sing
Rawls
Rawls
PROPN
NNP
punct
,
,
PUNCT
,
conj
Number=Sing
Kenneth
Kenneth
PROPN
NNP
flat
Number=Sing
J.
J.
PROPN
NNP
flat
Number=Sing
Arrow
Arrow
PROPN
NNP
punct
,
,
PUNCT
,
conj
Number=Sing
Amartya
Amartya
PROPN
NNP
flat
Number=Sing
K.
K.
PROPN
NNP
flat
Number=Sing
Sen
Sen
PROPN
NNP
punct
,
,
PUNCT
,
cc
and
and
CCONJ
CC
conj
Number=Sing
Robert
Robert
PROPN
NNP
flat
Number=Sing
Nozick
Nozick
PROPN
NNP
punct
.
.
PUNCT
.
In 1971 Gibbard earned his Ph.D., writing a dissertation under the direction of John Rawls.
case
in
In
ADP
IN
obl
NumForm=Digit|NumType=Card
1971
1971
NUM
CD
nsubj
Number=Sing
Gibbard
Gibbard
PROPN
NNP
root
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
earn
earned
VERB
VBD
nmod:poss
Case=Gen|Gender=Masc|Number=Sing|Person=3|Poss=Yes|PronType=Prs
his
his
PRON
PRP$
obj
Number=Sing
Ph.D.
Ph.D.
NOUN
NN
punct
,
,
PUNCT
,
advcl
VerbForm=Ger
write
writing
VERB
VBG
det
Definite=Ind|PronType=Art
a
a
DET
DT
obj
Number=Sing
dissertation
dissertation
NOUN
NN
case
under
under
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
obl
Number=Sing
direction
direction
NOUN
NN
case
of
of
ADP
IN
nmod
Number=Sing
John
John
PROPN
NNP
flat
Number=Sing
Rawls
Rawls
PROPN
NNP
punct
.
.
PUNCT
.
Soon after his doctoral degree, Gibbard provided a first proof of a conjecture that strategic voting was an intrinsic feature of non-dictatorial voting systems with at least three choices, a conjecture of Michael Dummett and Robin Farquharson.
advmod
Degree=Pos
soon
Soon
ADV
RB
case
after
after
ADP
IN
nmod:poss
Case=Gen|Gender=Masc|Number=Sing|Person=3|Poss=Yes|PronType=Prs
his
his
PRON
PRP$
amod
Degree=Pos
doctoral
doctoral
ADJ
JJ
obl
Number=Sing
degree
degree
NOUN
NN
punct
,
,
PUNCT
,
nsubj
Number=Sing
Gibbard
Gibbard
PROPN
NNP
root
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
provide
provided
VERB
VBD
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos|NumType=Ord
first
first
ADJ
JJ
obj
Number=Sing
proof
proof
NOUN
NN
case
of
of
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
nmod
Number=Sing
conjecture
conjecture
NOUN
NN
mark
that
that
SCONJ
IN
amod
Degree=Pos
strategic
strategic
ADJ
JJ
nsubj
Number=Sing
voting
voting
NOUN
NN
cop
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
be
was
AUX
VBD
det
Definite=Ind|PronType=Art
a
an
DET
DT
amod
Degree=Pos
intrinsic
intrinsic
ADJ
JJ
acl
Number=Sing
feature
feature
NOUN
NN
case
of
of
ADP
IN
amod
Degree=Pos
non-dictatorial
non-dictatorial
ADJ
JJ
compound
Number=Sing
voting
voting
NOUN
NN
nmod
Number=Plur
system
systems
NOUN
NNS
case
with
with
ADP
IN
case
at
at
ADP
IN
nmod
Degree=Sup
least
least
ADJ
JJS
nummod
NumForm=Word|NumType=Card
three
three
NUM
CD
nmod
Number=Plur
choice
choices
NOUN
NNS
punct
,
,
PUNCT
,
det
Definite=Ind|PronType=Art
a
a
DET
DT
appos
Number=Sing
conjecture
conjecture
NOUN
NN
case
of
of
ADP
IN
nmod
Number=Sing
Michael
Michael
PROPN
NNP
flat
Number=Sing
Dummett
Dummett
PROPN
NNP
cc
and
and
CCONJ
CC
conj
Number=Sing
Robin
Robin
PROPN
NNP
flat
Number=Sing
Farquharson
Farquharson
PROPN
NNP
punct
.
.
PUNCT
.