The Research Tower unlocks for players at Level 39. It is very time and resource consuming. It is well worth the expense once you have finish the majority of your other construction.
Here are times and costs of the items you can research.
Updates will be made as they are discovered.
Maneuver level 1 --- 10,000 wood and 11,000 stone require research time 21:50:00 speed of recruitment +9%
Maneuver level 2 --- 20,000 wood and 22,000 stone require research time 48:30:00 speed of recruitment +18%
Maneuver level 3 --- 30,000 wood and 33,000 stone require research time 64:26:40 speed of recruitment +27%
Maneuver level 4 --- 40,000 wood and 44.000 stone require research time 84:30:00 speed of recruitment +36%
Maneuver level 5 --- 50,000 wood and 55.000 stone require research time 115:58:20 speed of recruitment +45%
Forced March increased the travel speed of your own troops to your outposts and castles.
Force March level 1 - 8,000 wood and 8,800 stone require research time ?????? travel speed +xx%
Force March level 2 --- 16,000 wood and 17,600 stone require research time 14:30:00 travel speed +xx%
Force March level 3 --- 24,000 wood and 26,400 stone require research time 30:00:00 travel speed +xx%
Forced march level 4 ---32.000 wood and 35.200 stone require research time 41:56:40 travel speed +xx%
Forced march level 5 --40.000 wood and 44.000 stone require research time 62:38:20 travel speed +xx%
Forced march level 6 --xx.000 wood and xx.200 stone require research time xx:xx:xx travel speed +xx%
Forced march level 7 --70.000 wood and 77.000 stone require research time 103:00:00 travel speed+63%
Marching Formation level 1 - 37,100 wood and 40,320 stone require research time 24:01:40 reduce time to travel to other kingdom -10%
Marching Formation level 2 - xx wood and xx stone require
research time xx:xx:xx reduce time to travel to other kingdom -20%
Marching Formation level 3 - 1900 rubies 86:06:40 reduce time to travel to other kingdom -30%
Marching Formation level 4 - 3,500 rubies, require
research time 96:13:20 reduce time to travel to other kingdom -40%
Marching Formation level 5 - xx wood and xx stone require
research time xx:xx:xx reduce time to travel to other kingdom -50%
Wheel Tire level 1 --
Wheel Tire level 2 --
Wheel Tire level 3 -- 29,400 wood and 32340 stone require research time 51:30:00 market barrow speed +
Wheel Tire level 4 -- 39,200 wood and 43,120 stone require research time 72:50:00 market barrow speed + 60%
Wheel Tire level 5 -- 49,000 wood and 53,900 stone require research time 79:18:20 market barrow speed +75%
Levies level 1 --- 11,660 wood and 11,660 stone require research time 18:50:00 increase tax revenue +4%
Levies level 2 --- 23,320 wood and 23,320 stone require research time 37:13:20 increase tax revenue +8%
Levies level 3 (34.980 wood; 34.980 stone)
Plundering log level 1 --- 10,640 wood and 11,760 stone required, research time 15:16:40 resource from Plundering + 8%
Plundering log level 2 --- 21,280 wood and 23,520 stone required, research time 32:46:40 resource from Plundering + 16%
Plundering log level 3 --- 31,920 wood and 35,.280 stone required, research time 51:15:00 resource from plundering +24%
Plundering log level 4 --- 42,560 wood and 47,040 stone required, research time 70:16:40 resource from plundering +32%
Plundering log level 5 --- 53,200 wood and 58,800 stone required, research time 89:51:40 resource from plundering +40%
Veteran Spearman --- 55,000 wood and 50,000 stone required, research time 80:00:00
Veteran Bowman --- 55,000 wood and 50,000 stone required, research time 96:00:00
Veteran Macemen --- 55,000 wood and 60,000 stone required, research time 156:00:00
Veteran Crossbowmen --- 55,000 wood and 60,000 stone required, research time 156:00:00
Elite Training --- Increases speed of veteran soldiers by 20% (Research Tower 2)
Veteran Swordsman ---80,100 wood and 81,000 stone required, research time 160:00:00
Workbench level 1 --- 8,160 wood and 8,640 stone require research time 12:40:00 for tool production speed +9%
Workbench level 2 --- 16,320 wood and 17,280 stone require research time 23:36:40 for tool production speed +18%
Workbench level 3 --- 24,480 wood and 25,920 stone require research time 37:30:00 for tool production speed +27%
Workbench level 4 --- 32,640 wood and 34,560 stone require research time 52:13:20 for tool production speed +36%
Workbench level 5 --- 40,800 wood and 43,200 stone require research time 67:30:00 for tool production speed +45%
Workbench level 6 --- xx,xxx wood and xx,xxx stone require research time xx:xx:xx for tool production speed +xx%
Workbench level 7 --- 57,120 wood and 60,480 stone require research time 79:33:20 for tool production speed +63%
Workbench level 8 --- xx,xxx wood and xx,xxx stone require research time xx:xx:xx for tool production speed +xx%
Workbench level 9 --- xx,xxx wood and xx,xxx stone require research time xx:xx:xx for tool production speed +xx%
Pitsaw level 1--- 11,880 wood and 11,880 stone require research time 26:50:00... for wood +4%
Pitsaw level 2--- 23,760 wood and 23,760 stone require research time 64:00:00... for wood +8%
Pitsaw level 3--- 35,640 wood and 35,640 stone require research time 106:10:00... for wood +12%
Pitsaw level 4 --- 47.520 wood and 47.520 stone require research time 152:10:00... for wood +16%
Pitsaw level 5 --- 59,4000 wood and 59,400 stone require research time 167:38:20... for wood +20%
Wedging level 1--- 11,880 wood amd 11,880 stone require research time 26:50:00...for stone +4%
Wedging level 2--- 23,760 wood and 23,760 stone require research time 64:00:00... for stone +8%
Wedging level 3--- 35,640 wood and 35,640 stone require research time 106:10:00... for stone +12%
Wedging level 4--- 47.520 wood and 47.520 stone require research time 152:10:00... for stone +16%
Wedging level 5--- 59,400 wood and 59,400 stone require research time 167:38:20 ... for stone +20%
Three-field corp rotation lvl 1 11,990 wood and 11,990 stone require research time 31:40:00 food +4%
Three-field corp rotation lvl 2 23,980 wood and 23,980 stone require research time 72:50:00 food +8%
Three-field corp rotation lvl 3 35.970 wood and 35,970 stone require research time 98:45:00 food +12%
Three-field corp rotation lvl 4 47,960 wood and 47,960 stone require research time 139:26:40 food +16%
Three-field corp rotation lvl 5 59,950 wood and 59,950 stone require research time 182:13:20 food +20%
Reinforced Axle level 1 --- 31,270 wood and 34,100 stone require research time 18:11:40 (Research tower 2) increase transport barrow capacity +5%
Reinforced Axle level 2 --- 62,540 wood and 68,200 stone require research time 40:25:00 (Research tower 2) increase transport barrow capacity +10%
Caravan level 1 --- 31,110 wood and 33,390 stone require research time 18:36:40 (Research Tower 2) reduce time to transport resource to other kingdom -10%
Cash Transport --- (Research Tower 2) enables tax collection for 12 hours using coins
Shady business level 1 --- 9,800 wood and 10,780 stone require research time 22:10:00 agent speed +15%
Shady business level 2--- 19,600 wood and 21,560 stone require research time 40:58:20 agent speed +30%
Shady business level 3--- 32,400 wood and 32,340 stone require research time 52:13:20 agent speed +45%
Shady business level 4--- 39,200 wood and 43,120 stone require research time 90:58:20 agent speed +60%
Shady business level 5--
Shady business level 6--
Shady business level 7--
Chivalry level 1 --- 10,545 wood and 11,655 stone require research time 09:43:00 experience form battle +2%
Chivalry level 2 --- xx,xxx wood and xx,xxx stone require research time xx:xx:xx experience form battle +4%
Chivalry level 3 --- 31,635 wood and 34,965 stone require research time 26:13:20 experience form battle +6%
Barrow --- Increases experience points from constructions and upgrading buildings
Gutter Runners level 1 --- 15,390 wood and 15,960 stone require research time 22:13:20 (Research Tower 2) increase no. of agent +1
Working Shifts level 1 --- 15,750 wood and 16,120 stone require research time 24:26:40 (research Tower 2) increase no. of city guard +6%
Working Shifts level 2 --- 15,750 wood and 16,120 stone require research
time 24:26:40 (research Tower 2) increase no. of city guard +6%
Working Shifts level 3 --- 15,750 wood and 16,120 stone require research
time 24:26:40 (research Tower 2) increase no. of city guard +6%
Working Shifts level 4 --- 15,750 wood and 16,120 stone require research
time 24:26:40 (research Tower 2) increase no. of city guard +6%
Working Shifts level 5 --- 15,750 wood and 16,120 stone require research
time 24:26:40 (research Tower 2) increase no. of city guard +6%
Scout
Minstrel
Available only during the Researcher Event
Content courtesy of: http://en.board.goodgamestudios.com/empire/showthread.php?66749-Research-tower&highlight=research+tower