Examining the J-curve and S-curve patterns in Pakistan's economic ties with the USA and China, the world's economic giants. - Jing, Jin; Ahmad, Riaz; Usman, Sahibzada Muhammad; Iqbal, Javed; Ahmad, Sareer; Gul, Azeem; Mi, Hong; Abdirasulova, Zhainagul; Mamadievich, Ravshanbek Dzhumaev (Argumenta Oeconomica, 2025)