Я новый пользователь R и пытаюсь использовать данные панели (фиксированные эффекты), чтобы проанализировать влияние нескольких независимых переменных на журнал GNI. Я использую пакет plm, и это мой код
library(plm)
head(project_data)
Y = cbind(project_data$log_GNI_PPP)
X = cbind(project_data$EU_application, project_data$EU_membership,
project_data$distance_from_brussels, project_data$Former_USSR_DUMMY,
project_data$natural_resources_pct,
project_data$secondary_attendence_prct,
project_data$eu_education_interaction)
project_data_panel = pdata.frame(project_data, index = c("country_name", "year"))
plm(Y ~ X, data = project_data_panel, model = "within")
Однако, когда я это делаю, получаю сообщение об ошибке
Ошибка в классе (x) <- setdiff ( class (x), "pseries"): <br>недопустимо для установки класса в матрицу, если только атрибут измерения не имеет длины 2 (было 0)
Я не уверен, поскольку это означает, поскольку X, Y и project_data_panel, похоже, имеют правильные размеры (812 x 6) (812 x 1) и (812 x 16) соответственно. Кто-нибудь может увидеть, что я делаю не так?
Вот пример данных
dput(head(project_data, 50))
structure(list(country_name = c("Albania", "Albania", "Albania",
"Albania", "Albania", "Albania", "Albania", "Albania", "Albania",
"Albania", "Albania", "Albania", "Albania", "Albania", "Albania",
"Albania", "Albania", "Albania", "Albania", "Albania", "Albania",
"Albania", "Albania", "Albania", "Albania", "Albania", "Albania",
"Albania", "Albania", "Armenia", "Armenia", "Armenia", "Armenia",
"Armenia", "Armenia", "Armenia", "Armenia", "Armenia", "Armenia",
"Armenia", "Armenia", "Armenia", "Armenia", "Armenia", "Armenia",
"Armenia", "Armenia", "Armenia", "Armenia", "Armenia"), `Country Code` = c("ALB",
"ALB", "ALB", "ALB", "ALB", "ALB", "ALB", "ALB", "ALB", "ALB",
"ALB", "ALB", "ALB", "ALB", "ALB", "ALB", "ALB", "ALB", "ALB",
"ALB", "ALB", "ALB", "ALB", "ALB", "ALB", "ALB", "ALB", "ALB",
"ALB", "ARM", "ARM", "ARM", "ARM", "ARM", "ARM", "ARM", "ARM",
"ARM", "ARM", "ARM", "ARM", "ARM", "ARM", "ARM", "ARM", "ARM",
"ARM", "ARM", "ARM", "ARM"), year = c(1990, 1991, 1992, 1993,
1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015,
2016, 2017, 2018, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
2009, 2010), EU_application = c(0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), EU_membership = c(0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0), distance_from_brussels = c(1589, 1589,
1589, 1589, 1589, 1589, 1589, 1589, 1589, 1589, 1589, 1589, 1589,
1589, 1589, 1589, 1589, 1589, 1589, 1589, 1589, 1589, 1589, 1589,
1589, 1589, 1589, 1589, 1589, 3300, 3300, 3300, 3300, 3300, 3300,
3300, 3300, 3300, 3300, 3300, 3300, 3300, 3300, 3300, 3300, 3300,
3300, 3300, 3300, 3300), GNI_PPP_per_cap = c(2550, 1870, 1730,
2120, 2310, 2710, 3050, 2780, 3110, 3550, 3980, 4460, 4800, 5150,
5560, 5990, 6750, 7480, 8260, 8670, 9530, 10210, 10450, 10750,
11360, 11800, 12060, 12960, 13350, 2340, 2240, 1130, 1190, 1430,
1590, 1790, 1960, 2090, 2200, 2390, 2700, 3140, 3660, 4160, 4970,
5870, 6970, 7700, 6590, 6890), GNI_PPP_GROWTH = c(NA, "-36.36%",
"-8.09%", "18.40%", "8.23%", "14.76%", "11.15%", "-9.71%", "10.61%",
"12.39%", "10.80%", "10.76%", "7.08%", "6.80%", "7.37%", "7.18%",
"11.26%", "9.76%", "9.44%", "4.73%", "9.02%", "6.66%", "2.30%",
"2.79%", "5.37%", "3.73%", "2.16%", "6.94%", "2.92%", NA, "-4.27%",
"-49.55%", "5.31%", "20.17%", "11.19%", "12.58%", "9.50%", "6.63%",
"5.26%", "8.64%", "12.97%", "16.30%", "16.56%", "13.66%", "19.47%",
"18.11%", "18.74%", "10.47%", "-14.42%", "4.55%"), Stability_Index = c(NA,
NA, NA, NA, NA, 8, 8, 9, 8, 7, 7, 7, 7, 7, 7, 5, 5, 4, 3, 3,
3, 3, 2, 3, 2, 2, 2, 1, 1, NA, NA, NA, NA, NA, 8, 7, 8, 8, 8,
8, 9, 7, 7, 7, 7, 7, 6, 6, 7, 7), Former_USSR_DUMMY = c(0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1), `Tertiary_enrollment rate` = c("8.3663600000000002",
"8.8553300000000004", "9.2873199999999994", "11.17761", "10.63358",
"10.202819999999999", "10.939450000000001", "12.699719999999999",
"13.55017", "14.747769999999999", "15.53661", "15.904629999999999",
"16.311430000000001", "16.657240000000002", "19.890440000000002",
"23.189830000000001", "26.637139999999999", "30.68713", "32.092799999999997",
"33.385550000000002", "44.549250000000001", "49.878700000000002",
"59.252009999999999", "64.634429999999995", "65.782970000000006",
"62.007620000000003", "58.38185", "57.375259999999997", "54.961329999999997",
"23.204820000000002", "25.3567", "25.342120000000001", "23.027640000000002",
"19.124310000000001", "19.082139999999999", "16.938569999999999",
"22.720230000000001", "33.57358", "35.212409999999998", "35.549790000000002",
"33.545299999999997", "36.146859999999997", "37.218879999999999",
"37.883139999999997", "39.546770000000002", "43.115349999999999",
"45.93094", "48.489330000000002", "51.334589999999999", "52.989150000000002"
), `Trade Openess` = c(39.4369634, 36.07052006, 108.7854722,
80.51833277, 53.10258474, 47.61059487, 44.89542726, 45.42552335,
48.13748354, 51.01107175, 63.4540744, 66.49104645, 68.52503792,
67.02060851, 67.04722821, 70.87232827, 74.26708173, 83.20210079,
77.45174863, 75.09481856, 76.54335524, 81.21856394, 76.51020102,
75.87373278, 75.40786559, 71.80103037, 74.80985622, 78.16131198,
77.08240186, 81.33571855, 100.8658552, 101.0767594, 107.9731463,
112.4293646, 86.11485707, 79.22956012, 78.54774505, 71.84245188,
70.56047914, 73.91851927, 71.61719663, 75.94344895, 82.18767117,
75.03721018, 72.03895668, 62.60919306, 58.33644568, 55.70286492,
58.47886987, 66.14730981), natural_resources_pct = c(11.05002975,
9.344824468, 11.41790163, 2.804094484, 1.738143406, 1.28764727,
1.334614417, 1.37003297, 0.304234074, 0.568541328, 1.094738792,
0.732501135, 0.755764016, 0.762078498, 0.776381057, 1.050084705,
1.431007073, 2.171629466, 1.629199242, 0.98009147, 2.033752543,
3.455044143, 3.596119659, 3.578365186, 3.574896619, 1.813210471,
1.049502751, 1.698859222, NA, 0, 0, 0.105584847, 0.102698623,
0.468567478, 0.731881752, 0.511241769, 0.551497144, 0.160976758,
0.141442386, 0.363203884, 0.29675514, 0.460041922, 0.520673274,
0.974003626, 0.901240752, 1.788861711, 1.297061299, 1.294545673,
1.656635559, 2.992128557), Tertiary_enrollment_rate_prop = c(0.0836636,
0.0885533, 0.0928732, 0.1117761, 0.1063358, 0.1020282, 0.1093945,
0.1269972, 0.1355017, 0.1474777, 0.1553661, 0.1590463, 0.1631143,
0.1665724, 0.1989044, 0.2318983, 0.2663714, 0.3068713, 0.320928,
0.3338555, 0.4454925, 0.498787, 0.5925201, 0.6463443, 0.6578297,
0.6200762, 0.5838185, 0.5737526, 0.5496133, 0.2320482, 0.253567,
0.2534212, 0.2302764, 0.1912431, 0.1908214, 0.1693857, 0.2272023,
0.3357358, 0.3521241, 0.3554979, 0.335453, 0.3614686, 0.3721888,
0.3788314, 0.3954677, 0.4311535, 0.4593094, 0.4848933, 0.5133459,
0.5298915), log_GNI_PPP = c(7.84384863815247, 7.53369370984863,
7.45587668749182, 7.65917136766606, 7.74500280351584, 7.90470391387375,
8.02289686960146, 7.93020620668468, 8.04237800517328, 8.17470288246946,
8.28903709827848, 8.40290404501411, 8.47637119689598, 8.54675199365778,
8.62335338724463, 8.6978466911095, 8.81729778386658, 8.91998807096852,
9.01917986651502, 9.06762406977459, 9.16219999664825, 9.23112291115871,
9.25435725739296, 9.28266103355581, 9.33785369227514, 9.37585481045376,
9.39764947028118, 9.46962296990626, 9.4992716638284, 7.75790620835175,
7.71423114484909, 7.02997291170639, 7.08170858610557, 7.26542972325395,
7.37148929521428, 7.4899708988348, 7.58069975222456, 7.64491934495886,
7.69621263934641, 7.77904864492556, 7.90100705199242, 8.0519780789023,
8.20521842639541, 8.33327035325531, 8.51117511909067, 8.67760991282214,
8.84937050375457, 8.94897560784178, 8.79330862749655, 8.8378263640077
), secondary_attendence_prct = c(90.08174, 90.89363, 77.71476,
70.33512, 68.72906, 68.67849, 67.86755, 69.36618, 71.31361, 71.54467,
71.07808, 72.53716, 72.86855, 75.24344, 74.80221, 77.90939, 79.18955,
82.20059, 84.12509, 85.69499, 88.10389, 89.79816, 92.28983, 96.25608,
97.68487, 97.38848, 95.715, 95.26589, 95.43233, NA, 92.10371,
92.32686, 94.7447, 96.62907, NA, 93.3364, 93.23616, 80.43603,
80.05668, 92.15199, 88.28202, NA, NA, 89.34573, 92.05428, 94.94133,
96.42764, 94.97048, 100.12562, 104.71332)), row.names = c(NA,
50L), class = "data.frame")
Вот просто с помощью головы
head(project_data_panel, 50)
country_name Country Code year EU_application EU_membership
Albania-1990 Albania ALB 1990 0 0
Albania-1991 Albania ALB 1991 0 0
Albania-1992 Albania ALB 1992 0 0
Albania-1993 Albania ALB 1993 0 0
Albania-1994 Albania ALB 1994 0 0
Albania-1995 Albania ALB 1995 0 0
Albania-1996 Albania ALB 1996 0 0
Albania-1997 Albania ALB 1997 0 0
Albania-1998 Albania ALB 1998 0 0
Albania-1999 Albania ALB 1999 0 0
Albania-2000 Albania ALB 2000 0 0
Albania-2001 Albania ALB 2001 0 0
Albania-2002 Albania ALB 2002 0 0
Albania-2003 Albania ALB 2003 0 0
Albania-2004 Albania ALB 2004 0 0
Albania-2005 Albania ALB 2005 0 0
Albania-2006 Albania ALB 2006 0 0
Albania-2007 Albania ALB 2007 0 0
Albania-2008 Albania ALB 2008 0 0
Albania-2009 Albania ALB 2009 1 0
Albania-2010 Albania ALB 2010 1 0
Albania-2011 Albania ALB 2011 1 0
Albania-2012 Albania ALB 2012 1 0
Albania-2013 Albania ALB 2013 1 0
Albania-2014 Albania ALB 2014 1 0
Albania-2015 Albania ALB 2015 1 0
Albania-2016 Albania ALB 2016 1 0
Albania-2017 Albania ALB 2017 1 0
Albania-2018 Albania ALB 2018 1 0
Armenia-1990 Armenia ARM 1990 0 0
Armenia-1991 Armenia ARM 1991 0 0
Armenia-1992 Armenia ARM 1992 0 0
Armenia-1993 Armenia ARM 1993 0 0
Armenia-1994 Armenia ARM 1994 0 0
Armenia-1995 Armenia ARM 1995 0 0
Armenia-1996 Armenia ARM 1996 0 0
Armenia-1997 Armenia ARM 1997 0 0
Armenia-1998 Armenia ARM 1998 0 0
Armenia-1999 Armenia ARM 1999 0 0
Armenia-2000 Armenia ARM 2000 0 0
Armenia-2001 Armenia ARM 2001 0 0
Armenia-2002 Armenia ARM 2002 0 0
Armenia-2003 Armenia ARM 2003 0 0
Armenia-2004 Armenia ARM 2004 0 0
Armenia-2005 Armenia ARM 2005 0 0
Armenia-2006 Armenia ARM 2006 0 0
Armenia-2007 Armenia ARM 2007 0 0
Armenia-2008 Armenia ARM 2008 0 0
Armenia-2009 Armenia ARM 2009 0 0
Armenia-2010 Armenia ARM 2010 0 0
distance_from_brussels GNI_PPP_per_cap GNI_PPP_GROWTH Stability_Index
Albania-1990 1589 2550 <NA> NA
Albania-1991 1589 1870 -36.36% NA
Albania-1992 1589 1730 -8.09% NA
Albania-1993 1589 2120 18.40% NA
Albania-1994 1589 2310 8.23% NA
Albania-1995 1589 2710 14.76% 8
Albania-1996 1589 3050 11.15% 8
Albania-1997 1589 2780 -9.71% 9
Albania-1998 1589 3110 10.61% 8
Albania-1999 1589 3550 12.39% 7
Albania-2000 1589 3980 10.80% 7
Albania-2001 1589 4460 10.76% 7
Albania-2002 1589 4800 7.08% 7
Albania-2003 1589 5150 6.80% 7
Albania-2004 1589 5560 7.37% 7
Albania-2005 1589 5990 7.18% 5
Albania-2006 1589 6750 11.26% 5
Albania-2007 1589 7480 9.76% 4
Albania-2008 1589 8260 9.44% 3
Albania-2009 1589 8670 4.73% 3
Albania-2010 1589 9530 9.02% 3
Albania-2011 1589 10210 6.66% 3
Albania-2012 1589 10450 2.30% 2
Albania-2013 1589 10750 2.79% 3
Albania-2014 1589 11360 5.37% 2
Albania-2015 1589 11800 3.73% 2
Albania-2016 1589 12060 2.16% 2
Albania-2017 1589 12960 6.94% 1
Albania-2018 1589 13350 2.92% 1
Armenia-1990 3300 2340 <NA> NA
Armenia-1991 3300 2240 -4.27% NA
Armenia-1992 3300 1130 -49.55% NA
Armenia-1993 3300 1190 5.31% NA
Armenia-1994 3300 1430 20.17% NA
Armenia-1995 3300 1590 11.19% 8
Armenia-1996 3300 1790 12.58% 7
Armenia-1997 3300 1960 9.50% 8
Armenia-1998 3300 2090 6.63% 8
Armenia-1999 3300 2200 5.26% 8
Armenia-2000 3300 2390 8.64% 8
Armenia-2001 3300 2700 12.97% 9
Armenia-2002 3300 3140 16.30% 7
Armenia-2003 3300 3660 16.56% 7
Armenia-2004 3300 4160 13.66% 7
Armenia-2005 3300 4970 19.47% 7
Armenia-2006 3300 5870 18.11% 7
Armenia-2007 3300 6970 18.74% 6
Armenia-2008 3300 7700 10.47% 6
Armenia-2009 3300 6590 -14.42% 7
Armenia-2010 3300 6890 4.55% 7
Former_USSR_DUMMY Tertiary_enrollment rate Trade Openess
Albania-1990 0 8.3663600000000002 39.43696
Albania-1991 0 8.8553300000000004 36.07052
Albania-1992 0 9.2873199999999994 108.78547
Albania-1993 0 11.17761 80.51833
Albania-1994 0 10.63358 53.10258
Albania-1995 0 10.202819999999999 47.61059
Albania-1996 0 10.939450000000001 44.89543
Albania-1997 0 12.699719999999999 45.42552
Albania-1998 0 13.55017 48.13748
Albania-1999 0 14.747769999999999 51.01107
Albania-2000 0 15.53661 63.45407
Albania-2001 0 15.904629999999999 66.49105
Albania-2002 0 16.311430000000001 68.52504
Albania-2003 0 16.657240000000002 67.02061
Albania-2004 0 19.890440000000002 67.04723
Albania-2005 0 23.189830000000001 70.87233
Albania-2006 0 26.637139999999999 74.26708
Albania-2007 0 30.68713 83.20210
Albania-2008 0 32.092799999999997 77.45175
Albania-2009 0 33.385550000000002 75.09482
Albania-2010 0 44.549250000000001 76.54336
Albania-2011 0 49.878700000000002 81.21856
Albania-2012 0 59.252009999999999 76.51020
Albania-2013 0 64.634429999999995 75.87373
Albania-2014 0 65.782970000000006 75.40787
Albania-2015 0 62.007620000000003 71.80103
Albania-2016 0 58.38185 74.80986
Albania-2017 0 57.375259999999997 78.16131
Albania-2018 0 54.961329999999997 77.08240
Armenia-1990 1 23.204820000000002 81.33572
Armenia-1991 1 25.3567 100.86586
Armenia-1992 1 25.342120000000001 101.07676
Armenia-1993 1 23.027640000000002 107.97315
Armenia-1994 1 19.124310000000001 112.42936
Armenia-1995 1 19.082139999999999 86.11486
Armenia-1996 1 16.938569999999999 79.22956
Armenia-1997 1 22.720230000000001 78.54775
Armenia-1998 1 33.57358 71.84245
Armenia-1999 1 35.212409999999998 70.56048
Armenia-2000 1 35.549790000000002 73.91852
Armenia-2001 1 33.545299999999997 71.61720
Armenia-2002 1 36.146859999999997 75.94345
Armenia-2003 1 37.218879999999999 82.18767
Armenia-2004 1 37.883139999999997 75.03721
Armenia-2005 1 39.546770000000002 72.03896
Armenia-2006 1 43.115349999999999 62.60919
Armenia-2007 1 45.93094 58.33645
Armenia-2008 1 48.489330000000002 55.70286
Armenia-2009 1 51.334589999999999 58.47887
Armenia-2010 1 52.989150000000002 66.14731
natural_resources_pct Tertiary_enrollment_rate_prop log_GNI_PPP
Albania-1990 11.0500298 0.0836636 7.843849
Albania-1991 9.3448245 0.0885533 7.533694
Albania-1992 11.4179016 0.0928732 7.455877
Albania-1993 2.8040945 0.1117761 7.659171
Albania-1994 1.7381434 0.1063358 7.745003
Albania-1995 1.2876473 0.1020282 7.904704
Albania-1996 1.3346144 0.1093945 8.022897
Albania-1997 1.3700330 0.1269972 7.930206
Albania-1998 0.3042341 0.1355017 8.042378
Albania-1999 0.5685413 0.1474777 8.174703
Albania-2000 1.0947388 0.1553661 8.289037
Albania-2001 0.7325011 0.1590463 8.402904
Albania-2002 0.7557640 0.1631143 8.476371
Albania-2003 0.7620785 0.1665724 8.546752
Albania-2004 0.7763811 0.1989044 8.623353
Albania-2005 1.0500847 0.2318983 8.697847
Albania-2006 1.4310071 0.2663714 8.817298
Albania-2007 2.1716295 0.3068713 8.919988
Albania-2008 1.6291992 0.3209280 9.019180
Albania-2009 0.9800915 0.3338555 9.067624
Albania-2010 2.0337525 0.4454925 9.162200
Albania-2011 3.4550441 0.4987870 9.231123
Albania-2012 3.5961197 0.5925201 9.254357
Albania-2013 3.5783652 0.6463443 9.282661
Albania-2014 3.5748966 0.6578297 9.337854
Albania-2015 1.8132105 0.6200762 9.375855
Albania-2016 1.0495028 0.5838185 9.397649
Albania-2017 1.6988592 0.5737526 9.469623
Albania-2018 NA 0.5496133 9.499272
Armenia-1990 0.0000000 0.2320482 7.757906
Armenia-1991 0.0000000 0.2535670 7.714231
Armenia-1992 0.1055848 0.2534212 7.029973
Armenia-1993 0.1026986 0.2302764 7.081709
Armenia-1994 0.4685675 0.1912431 7.265430
Armenia-1995 0.7318818 0.1908214 7.371489
Armenia-1996 0.5112418 0.1693857 7.489971
Armenia-1997 0.5514971 0.2272023 7.580700
Armenia-1998 0.1609768 0.3357358 7.644919
Armenia-1999 0.1414424 0.3521241 7.696213
Armenia-2000 0.3632039 0.3554979 7.779049
Armenia-2001 0.2967551 0.3354530 7.901007
Armenia-2002 0.4600419 0.3614686 8.051978
Armenia-2003 0.5206733 0.3721888 8.205218
Armenia-2004 0.9740036 0.3788314 8.333270
Armenia-2005 0.9012408 0.3954677 8.511175
Armenia-2006 1.7888617 0.4311535 8.677610
Armenia-2007 1.2970613 0.4593094 8.849371
Armenia-2008 1.2945457 0.4848933 8.948976
Armenia-2009 1.6566356 0.5133459 8.793309
Armenia-2010 2.9921286 0.5298915 8.837826
secondary_attendence_prct
Albania-1990 90.08174
Albania-1991 90.89363
Albania-1992 77.71476
Albania-1993 70.33512
Albania-1994 68.72906
Albania-1995 68.67849
Albania-1996 67.86755
Albania-1997 69.36618
Albania-1998 71.31361
Albania-1999 71.54467
Albania-2000 71.07808
Albania-2001 72.53716
Albania-2002 72.86855
Albania-2003 75.24344
Albania-2004 74.80221
Albania-2005 77.90939
Albania-2006 79.18955
Albania-2007 82.20059
Albania-2008 84.12509
Albania-2009 85.69499
Albania-2010 88.10389
Albania-2011 89.79816
Albania-2012 92.28983
Albania-2013 96.25608
Albania-2014 97.68487
Albania-2015 97.38848
Albania-2016 95.71500
Albania-2017 95.26589
Albania-2018 95.43233
Armenia-1990 NA
Armenia-1991 92.10371
Armenia-1992 92.32686
Armenia-1993 94.74470
Armenia-1994 96.62907
Armenia-1995 NA
Armenia-1996 93.33640
Armenia-1997 93.23616
Armenia-1998 80.43603
Armenia-1999 80.05668
Armenia-2000 92.15199
Armenia-2001 88.28202
Armenia-2002 NA
Armenia-2003 NA
Armenia-2004 89.34573
Armenia-2005 92.05428
Armenia-2006 94.94133
Armenia-2007 96.42764
Armenia-2008 94.97048
Armenia-2009 100.12562
Armenia-2010 104.71332
и это информация о моей сессии
R version 3.6.2 (2019-12-12)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18363)
Matrix products: default
locale:
[1] LC_COLLATE=English_Ireland.1252 LC_CTYPE=English_Ireland.1252
[3] LC_MONETARY=English_Ireland.1252 LC_NUMERIC=C
[5] LC_TIME=English_Ireland.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] plm_2.2-3
loaded via a namespace (and not attached):
[1] Rcpp_1.0.3 pillar_1.4.3 compiler_3.6.2 miscTools_0.6-26 bitops_1.0-6
[6] tools_3.6.2 testthat_2.3.1 digest_0.6.23 nlme_3.1-142 lattice_0.20-38
[11] lifecycle_0.1.0 tibble_2.1.3 gtable_0.3.0 pkgconfig_2.0.3 rlang_0.4.5
[16] bibtex_0.4.2.2 rstudioapi_0.10 maxLik_1.3-8 swirl_2.4.5 yaml_2.2.0
[21] dplyr_0.8.4 httr_1.4.1 stringr_1.4.0 lmtest_0.9-37 gbRd_0.4-11
[26] grid_3.6.2 tidyselect_1.0.0 glue_1.3.1 R6_2.4.1 bdsmatrix_1.3-4
[31] Rdpack_0.11-1 Formula_1.2-3 ggplot2_3.2.1 purrr_0.3.3 magrittr_1.5
[36] scales_1.1.0 MASS_7.3-51.4 assertthat_0.2.1 colorspace_1.4-1 sandwich_2.5-1
[41] stringi_1.4.6 RCurl_1.98-1.1 lazyeval_0.2.2 munsell_0.5.0 crayon_1.3.4
[46] zoo_1.8-7
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