A laminated balun transformer that may be used for lines having various impedances includes a first magnetic substrate, a laminated body, a second magnetic substrate, and external electrodes. A cursor control device, such as a mouse, is monitored for signals of movement. The system then determines the selected subset of transmit antennas by receiving lists of selected antennas from mobile stations associated with preferred users, wherein a given mobile station selects a list of antennas in response to pilot signals received during the full pilot transmission. Each of the outcomes includes a plurality of symbols placed in a symbol array. The main body of the pin connector is provided with a free section able to engage sealingly inside an annular cavity of this socket connector. Statistical regression and the theory of the single-product firm is used to analyze the relation between changes in performance variables and changes in the price index, leading to a unit-specific index of sensitivity.