La griglia delle parità bilaterali al 13 marzo 1979 Amsterdam (in HFL) Bruxelles (in BFR/LFR) Dublino (in IRL) Francoforte (in DM) Copenhagen (in DKR) Parigi (in FF) Roma (in LIT) 1 ECU 2,72077 39,4582 0,662638 2,51064 7,08592 5,79831 1.148,15 100 HFL + 2,25% 100 1.483,25 24,9089 94,375 266,365 217,96 44.807,4 Parità 1.450,26 24,3548 92,2767 260,439 213,113 42.199,5 - 2,25% 1.413,00 23,8130 90,225 254,645 208,38 39.743,4 100 BFR/LFR 7,0520 1,71755 6,508 18,3665 15,029 3.089,61 6,8953 1,67934 6,36277 17,9581 14,6948 2.909,79 6,7420 1,64198 6,221 17,5585 14,368 2.740,44 1 IRL 4,1995 60,9020 1 3,875 10,9365 8,9495 1.839,78 4,10597 59,5471 3,78886 10,6935 8,75034 1.732,70 4,0145 58,2225 3,705 10,4555 8,5555 1.631,85 100 DM 110,835 1.607,4 26,9937 288,66 236,21 48.557,6 108,37 1.571,64 26,3932 282,237 230,95 45.731,4 105,96 1.536,65 25,8060 275,96 225,81 43.069,8 100 DKR 39,2700 569,5 9,56424 36,235 83,69 17.204,5 38,3967 556,852 9,35146 35,4313 81,8286 16.203,3 37,5425 544,45 9,14343 34,645 80,01 15.260,5 100 FF 47,99 696,00 11,6881 44,285 124,985 21.025,2 46,9235 680,512 11,4281 43,2995 122,207 19.801,5 45,88 665,375 11,1739 42,335 119,49 18.649,0 1.000 LIT + 6% 2,5160 36,490 0,612801 2,322 6,553 5,362 1.000 2,36970 34,3668 0,577136 2,18668 6,1716 5,05013 - 6% 2,23175 32,365 0,543545 2,059 5,813 4,756

La griglia delle parità bilaterali al 16 marzo 1998   100 BFR 100 DKR 100 DM 100 GRD 100 ESP 100 FF 1 IRL 1.000 LIT 100 HFL 100 ATS 100 PTE 100 FIM 1 ECU Bruxelles (in BFR/LFR) 16,12% 100 627,88 2395,2 13,2655 28,1525 714,03 59,4775 24,192 2125,6 340,42 23,3645 787,83 40,7844 Parità 540,723 2062,55 11,4242 24,2447 614,977 51,221 20,8337 1830,54 293,163 20,1214 678,468 -13,88% 465,665 1776,2 9,83835 20,8795 529,66 44,11 17,9417 1576,45 252,47 17,3285 584,29 Copenhagen (in DKR) 21,4747 442,968 2,45331 5,2064 132,066 10,9995 4,474 393,105 62,9561 4,321 145,699 7,54257 18,4938 381,443 2,11276 4,48376 113,732 9,47269 3,85294 338,537 54,217 3,72119 125,474 15,9266 328,461 1,81948 4,8614 97,943 8,15774 3,3181 291,544 46,691 3,2046 108,057 Francoforte DM) 5,63 30,445 0,6432 1,365 34,625 2,8837 1,1729 103,058 16,505 1,1328 38,197 1,97738 4,84837 26,2162 0,553888 1,17548 29,8164 2,48338 1,0101 88,7526 14,2136 0,975561 32,8948 4,175 22,575 0,477 1,0123 25,675 2,1386 0,8699 76,4326 12,241 0,8401 28,328 Atene GRD) 1.016,43 5.496,05 20.964,3 246,429 6.250,8 520,624 211,77 18.606,2 2.979,78 204,52 6.896,13 357 875,335 4.733,13 18.054,2 212,222 5.383,11 448,355 182,365 16.023,4 2.566,15 176,129 5.938,86 753,827 4.076,11 15.547,2 182,763 4.635,86 386,117 157,06 13.799,1 2.209,94 151,681 5.114,47 Madrid ESP) 478,944 2.589,8 9.878,5 54,7156 2.945,4 245,32 99,78 8.767,3 1.404,1 96,367 3.249,5 168,22 412,461 2.230,27 8.507,18 47,1204 2.536,54 211,267 85,9311 7.550,3 1.209,18 82,9927 2.798,41 355,206 1.920,7 7.326 40,5795 2.184,4 181,94 74 6.502,2 1.041,3 71,469 2.410 Parigi FF) 18,88 102,1 389,48 2,15709 4,5778 9,67145 3,93379 345,65 55,3545 3,7992 128,107 6,63186 16,2608 87,9257 335,386 1,85766 3,94237 8,32893 3,38773 297,661 47,6706 3,27188 110,324 14,005 75,72 288,81 1,59979 3,3951 7,17277 2,9175 256,35 41,0533 2,8177 95,0096 Dublino IRL) 2,26706 12,2583 46,7595 0,258989 0,549632 13,9416 1 0,472304 41,4989 6,64602 0,456154 15,341 0,796244 1,95232 10,5567 40,2676 0,223038 0,473335 12,0063 0,406743 35,7382 5,72347 0,392834 13,2459 1,68131 9,09132 34,6776 0,192077 0,407631 10,3397 0,350281 30,7778 4,929 0,338304 11,4072 Roma LIT) 5.573,6 30.138 114.956 636,7 1.351,3 34.276 2.854,85 1.000 102.027 16.339 1.121,5 37.816 1.957,61 4.799,91 25.954,2 99.000,4 548,35 1.163,72 29.518,3 2.458,56 87.864,7 14.071,5 965,805 32.565,8 4.133,6 25.351 85.259 472,2 1.002,2 25.421 2.117,28 75.668 12.118 831,7 28.045 Amsterdam HFL) 6,3434 34,3002 130,834 0,724682 1,53793 39,0091 3,2491 1,32156 18,5963 1,27637 43,0378 2,22799 5,46286 29,5389 112,673 0,624087 1,32445 33,5953 2,77812 1,13811 16,0149 1,0992 37,0636 4,70454 25,4385 97,0325 0,537456 1,1406 28,9381 2,4097 0,980132 13,7918 0,946611 31,9187 Vienna ATS) 39,6089 214,174 816,927 4,525 9,60338 243,586 20,2881 8,25219 725,065 7,97 268,735 13,9119 34,1107 184,444 703,55 3,89689 8,27008 209,773 17,4719 7,10655 624,417 6,86356 231,431 29,3757 158,841 605,877 3,35595 7,122 180,654 15,0466 6,12032 537,74 5,91086 199,305 Porto PTE) 577,09 3.120,5 11.903,3 65,928 139,92 3.549 295,592 120,24 10.564 1.691,8 3.915,4 202,692 496,984 2.687,31 10.250,5 56,7765 120,493 3.056,35 254,56 103,541 9.097,55 1.456,97 3.371,88 428 2.314,3 8.827,7 48,895 103,77 2.632,1 219,224 89,17 7.834,7 1.254,7 2.903,8 Helsinki FIM) 17,1148 92,5438 353,008 1,95523 4,14938 105,253 8,76639 3,5657 313,295 50,1744 3,44376 6,01125 14,7391 79,6976 304 1,68382 3,57345 90,6422 7,54951 3,07071 269,806 43,2094 2,9657 12,6931 68,6347 261,801 1,45008 3,0774 78,0597 6,50154 2,64438 232,353 37,2114 2,55402

Nota matematica sulla griglia delle parità Ricordando, però, che per le proprietà dei tassi di cambio dovrebbe valere (l1/m1)(m2/l2) = 1, la formula precedente, semplificando, diviene:

Le vicende degli AEC: 1979–1998 (1) BFR/LFR DKR DM GRD ESP FF IRL LIT HFL ATS PTE FIM UKL 13/03/1979 39,4582 7,08592 2,51064 5,79831 0,662638 1.148,18 2,72077 0,663247 Creazione 24/09/1979 39,8456 7,36594 2,48557 5,85522 0,669141 1.159,42 2,74748 0,649821 Riallineamento 30/11/1979 39,7897 7,72336 2,48208 5,84700 0,668201 1.157,79 2,74362 0,648910 23/03/1981 40,7985 7,91917 2,54502 5,99526 0,685145 1.262,92 2,81318 0,542122 05/10/1981 40,7572 7,91117 2,40989 6,17443 0,684452 1.300,67 2,66382 0,601048 22/02/1982 44,6963 8,18382 2,41815 6,19564 0,686799 1.305,13 2,67296 0,557037 14/06/1982 44,9704 8,23400 2,33379 6,61387 0,691011 1.350,27 2,57971 0,560453 21/03/1983 44,3662 8,04412 2,21515 6,79271 0,717050 1.386,78 2,49587 0,629848 18/05/1983 44,9008 8,14104 2,24184 6,87456 0,725690 1.403,49 2,52595 0,587087 17/09/1984 87,4813 0,585992 Nuova composizione del paniere ECU 22/07/1985 44,8320 8,12857 2,23840 100,719 6,86402 0,724578 1.520,60 2,52208 0,555312 07/04/1986 43,6761 7,91896 2,13834 135,659 6,96260 0,712956 1.496,21 2,40935 0,630317 04/08/1986 43,1139 7,81701 2,11083 137,049 6,87316 0,764976 1.476,95 2,37833 0,679256 12/01/1987 42,4582 7,85212 2,05853 150,792 6,90403 0,768411 1.483,58 2,31943 0,739615 19/06/1989 133,804 ESP dentro gli AEC 21/09/1989 172,085 0,728627

Le vicende degli AEC: 1979–1998 (2) BFR/LFR DKR DM GRD ESP FF IRL LIT HFL ATS PTE FIM UKL 08/01/1990 42,1679 7,79845 2,04446 187,934 132,889 6,85684 0,763159 1.529,70 2,30358 177,743 0,728615 Riallineamento 08/10/1990 42,4032 7,84195 2,05586 205,311 133,631 6,89509 0,767417 1.538,24 2,31643 178,735 0,696904 UKL dentro gli AEC 06/04/1992 PTE dentro gli AEC 14/09/1992 42,0639 7,77921 2,03942 251,202 132,562 6,83992 0,761276 1.636,61 2,29789 177,305 0,691328 17/09/1992 41,9547 7,75901 2,03412 250,550 139,176 6,82216 0,759300 1.632,36 2,29193 176,844 0,689533 UKL e LIT fuori dagli AEC, Riallineamento 23/11/1992 40,6304 7,51410 1,96992 254,254 143,386 6,60683 0,735334 1.690,76 2,21958 182,194 0,805748 01/02/1993 40,2802 7,44934 1,95294 259,306 142,150 6,54988 0,809996 1.796,22 2,20045 180,624 0,808431 14/05/1993 40,2123 7,43679 1,94964 264,513 154,250 6,53883 0,808628 1.793,19 2,19672 192,854 0,786749 03/08/1993 Ampliamento dei margini di fluttuazione 09/01/1995 13,7167 ATS dentro gli AEC 06/03/1995 39,3960 7,28580 1,91007 292,867 162,493 6,40608 0,792214 2.106,15 2,15214 13,4383 195,792 0,786652 14/10/1996 5,80661 FIM dentro gli AEC 25/11/1996 39,7191 7,34555 1,92573 295,269 163,826 6,45863 0,798709 1.906,48 2,16979 13,5485 197,398 5,85424 0,793103 LIT di nuovo dentro gli AEC 16/03/1998 40,7844 7,54257 1,97738 357,000 168,220 6,63186 0,796244 1.957,61 2,22799 13,9119 202,692 6,01125 0,653644 GRD dentro gli AEC, Riallineamento